rnd-20030828-2-src
[rocksndiamonds.git] / src / editor.c
index 4a47194a4066bd6b346616bbca718db1f1a1c7b8..02e65f15c66813d595d3df642ed90ba8f990c1bd 100644 (file)
 #define ED_SETTINGS2_YPOS              (ED_SETTINGS1_YPOS + 12 * TILEY - 2)
 
 /* values for counter gadgets */
-#define ED_COUNT_PUSH_DELAY_RND_XPOS   (ED_SETTINGS_XPOS(1) + 16 * MINI_TILEX)
-#define ED_COUNT_MOVE_DELAY_RND_XPOS   ED_COUNT_PUSH_DELAY_RND_XPOS
-#define ED_COUNT_CHANGE_DELAY_RND_XPOS (ED_SETTINGS_XPOS(1) + 13 * MINI_TILEX)
-
 #define ED_COUNTER_YSTART              (ED_SETTINGS1_YPOS + 2 * TILEY)
 #define ED_COUNTER_YDISTANCE           (3 * MINI_TILEY)
 #define ED_COUNTER_YPOS(n)             (ED_COUNTER_YSTART + \
                                         6 * (n / 4) * MINI_TILEY)
 
 /* custom change target */
-#define ED_AREA_ELEM_CONTENT2_XPOS     (20 * MINI_TILEX)
 #define ED_AREA_ELEM_CONTENT2_YPOS     (ED_SETTINGS_YPOS(2) + \
                                         ED_GADGET_DISTANCE)
 /* optional custom graphic */
-#define ED_AREA_ELEM_CONTENT3_XPOS     (24 * MINI_TILEX)
 #define ED_AREA_ELEM_CONTENT3_YPOS     (ED_SETTINGS_YPOS(1) + \
                                         ED_GADGET_DISTANCE)
 /* custom element content */
 #define ED_AREA_ELEM_CONTENT4_YPOS     (ED_SETTINGS_YPOS(12) + \
                                         ED_GADGET_DISTANCE - MINI_TILEY)
 /* custom change trigger element */
-#define ED_AREA_ELEM_CONTENT5_XPOS     (28 * MINI_TILEX)
 #define ED_AREA_ELEM_CONTENT5_YPOS     (ED_SETTINGS_YPOS(7) + \
                                         ED_GADGET_DISTANCE)
 /* extended custom change target */
                                         ED_GADGET_DISTANCE - MINI_TILEY)
 
 /* values for random placement background drawing area */
-#define ED_AREA_RANDOM_BACKGROUND_XPOS (29 * MINI_TILEX)
 #define ED_AREA_RANDOM_BACKGROUND_YPOS (31 * MINI_TILEY)
 
 /* values for scrolling gadgets for drawing area */
 #define GADGET_ID_ELEMENT_CONTENT_DOWN (GADGET_ID_COUNTER_FIRST + 24)
 #define GADGET_ID_ELEMENT_CONTENT_TEXT (GADGET_ID_COUNTER_FIRST + 25)
 #define GADGET_ID_ELEMENT_CONTENT_UP   (GADGET_ID_COUNTER_FIRST + 26)
-#define GADGET_ID_CUSTOM_SCORE_DOWN    (GADGET_ID_COUNTER_FIRST + 27)
-#define GADGET_ID_CUSTOM_SCORE_TEXT    (GADGET_ID_COUNTER_FIRST + 28)
-#define GADGET_ID_CUSTOM_SCORE_UP      (GADGET_ID_COUNTER_FIRST + 29)
-#define GADGET_ID_CUSTOM_GEMCOUNT_DOWN (GADGET_ID_COUNTER_FIRST + 30)
-#define GADGET_ID_CUSTOM_GEMCOUNT_TEXT (GADGET_ID_COUNTER_FIRST + 31)
-#define GADGET_ID_CUSTOM_GEMCOUNT_UP   (GADGET_ID_COUNTER_FIRST + 32)
-#define GADGET_ID_PUSH_DELAY_FIX_DOWN  (GADGET_ID_COUNTER_FIRST + 33)
-#define GADGET_ID_PUSH_DELAY_FIX_TEXT  (GADGET_ID_COUNTER_FIRST + 34)
-#define GADGET_ID_PUSH_DELAY_FIX_UP    (GADGET_ID_COUNTER_FIRST + 35)
-#define GADGET_ID_PUSH_DELAY_RND_DOWN  (GADGET_ID_COUNTER_FIRST + 36)
-#define GADGET_ID_PUSH_DELAY_RND_TEXT  (GADGET_ID_COUNTER_FIRST + 37)
-#define GADGET_ID_PUSH_DELAY_RND_UP    (GADGET_ID_COUNTER_FIRST + 38)
-#define GADGET_ID_MOVE_DELAY_FIX_DOWN  (GADGET_ID_COUNTER_FIRST + 39)
-#define GADGET_ID_MOVE_DELAY_FIX_TEXT  (GADGET_ID_COUNTER_FIRST + 40)
-#define GADGET_ID_MOVE_DELAY_FIX_UP    (GADGET_ID_COUNTER_FIRST + 41)
-#define GADGET_ID_MOVE_DELAY_RND_DOWN  (GADGET_ID_COUNTER_FIRST + 42)
-#define GADGET_ID_MOVE_DELAY_RND_TEXT  (GADGET_ID_COUNTER_FIRST + 43)
-#define GADGET_ID_MOVE_DELAY_RND_UP    (GADGET_ID_COUNTER_FIRST + 44)
-#define GADGET_ID_CHANGE_DELAY_FIX_DOWN        (GADGET_ID_COUNTER_FIRST + 45)
-#define GADGET_ID_CHANGE_DELAY_FIX_TEXT        (GADGET_ID_COUNTER_FIRST + 46)
-#define GADGET_ID_CHANGE_DELAY_FIX_UP  (GADGET_ID_COUNTER_FIRST + 47)
-#define GADGET_ID_CHANGE_DELAY_RND_DOWN        (GADGET_ID_COUNTER_FIRST + 48)
-#define GADGET_ID_CHANGE_DELAY_RND_TEXT        (GADGET_ID_COUNTER_FIRST + 49)
-#define GADGET_ID_CHANGE_DELAY_RND_UP  (GADGET_ID_COUNTER_FIRST + 50)
-#define GADGET_ID_CHANGE_CONT_RND_DOWN (GADGET_ID_COUNTER_FIRST + 51)
-#define GADGET_ID_CHANGE_CONT_RND_TEXT (GADGET_ID_COUNTER_FIRST + 52)
-#define GADGET_ID_CHANGE_CONT_RND_UP   (GADGET_ID_COUNTER_FIRST + 53)
+#define GADGET_ID_ENVELOPE_XSIZE_DOWN  (GADGET_ID_COUNTER_FIRST + 27)
+#define GADGET_ID_ENVELOPE_XSIZE_TEXT  (GADGET_ID_COUNTER_FIRST + 28)
+#define GADGET_ID_ENVELOPE_XSIZE_UP    (GADGET_ID_COUNTER_FIRST + 29)
+#define GADGET_ID_ENVELOPE_YSIZE_DOWN  (GADGET_ID_COUNTER_FIRST + 30)
+#define GADGET_ID_ENVELOPE_YSIZE_TEXT  (GADGET_ID_COUNTER_FIRST + 31)
+#define GADGET_ID_ENVELOPE_YSIZE_UP    (GADGET_ID_COUNTER_FIRST + 32)
+#define GADGET_ID_CUSTOM_SCORE_DOWN    (GADGET_ID_COUNTER_FIRST + 33)
+#define GADGET_ID_CUSTOM_SCORE_TEXT    (GADGET_ID_COUNTER_FIRST + 34)
+#define GADGET_ID_CUSTOM_SCORE_UP      (GADGET_ID_COUNTER_FIRST + 35)
+#define GADGET_ID_CUSTOM_GEMCOUNT_DOWN (GADGET_ID_COUNTER_FIRST + 36)
+#define GADGET_ID_CUSTOM_GEMCOUNT_TEXT (GADGET_ID_COUNTER_FIRST + 37)
+#define GADGET_ID_CUSTOM_GEMCOUNT_UP   (GADGET_ID_COUNTER_FIRST + 38)
+#define GADGET_ID_PUSH_DELAY_FIX_DOWN  (GADGET_ID_COUNTER_FIRST + 39)
+#define GADGET_ID_PUSH_DELAY_FIX_TEXT  (GADGET_ID_COUNTER_FIRST + 40)
+#define GADGET_ID_PUSH_DELAY_FIX_UP    (GADGET_ID_COUNTER_FIRST + 41)
+#define GADGET_ID_PUSH_DELAY_RND_DOWN  (GADGET_ID_COUNTER_FIRST + 42)
+#define GADGET_ID_PUSH_DELAY_RND_TEXT  (GADGET_ID_COUNTER_FIRST + 43)
+#define GADGET_ID_PUSH_DELAY_RND_UP    (GADGET_ID_COUNTER_FIRST + 44)
+#define GADGET_ID_MOVE_DELAY_FIX_DOWN  (GADGET_ID_COUNTER_FIRST + 45)
+#define GADGET_ID_MOVE_DELAY_FIX_TEXT  (GADGET_ID_COUNTER_FIRST + 46)
+#define GADGET_ID_MOVE_DELAY_FIX_UP    (GADGET_ID_COUNTER_FIRST + 47)
+#define GADGET_ID_MOVE_DELAY_RND_DOWN  (GADGET_ID_COUNTER_FIRST + 48)
+#define GADGET_ID_MOVE_DELAY_RND_TEXT  (GADGET_ID_COUNTER_FIRST + 49)
+#define GADGET_ID_MOVE_DELAY_RND_UP    (GADGET_ID_COUNTER_FIRST + 50)
+#define GADGET_ID_CHANGE_DELAY_FIX_DOWN        (GADGET_ID_COUNTER_FIRST + 51)
+#define GADGET_ID_CHANGE_DELAY_FIX_TEXT        (GADGET_ID_COUNTER_FIRST + 52)
+#define GADGET_ID_CHANGE_DELAY_FIX_UP  (GADGET_ID_COUNTER_FIRST + 53)
+#define GADGET_ID_CHANGE_DELAY_RND_DOWN        (GADGET_ID_COUNTER_FIRST + 54)
+#define GADGET_ID_CHANGE_DELAY_RND_TEXT        (GADGET_ID_COUNTER_FIRST + 55)
+#define GADGET_ID_CHANGE_DELAY_RND_UP  (GADGET_ID_COUNTER_FIRST + 56)
+#define GADGET_ID_CHANGE_CONT_RND_DOWN (GADGET_ID_COUNTER_FIRST + 57)
+#define GADGET_ID_CHANGE_CONT_RND_TEXT (GADGET_ID_COUNTER_FIRST + 58)
+#define GADGET_ID_CHANGE_CONT_RND_UP   (GADGET_ID_COUNTER_FIRST + 59)
 
 /* drawing area identifiers */
-#define GADGET_ID_DRAWING_AREA_FIRST   (GADGET_ID_COUNTER_FIRST + 54)
+#define GADGET_ID_DRAWING_AREA_FIRST   (GADGET_ID_COUNTER_FIRST + 60)
 
 #define GADGET_ID_DRAWING_LEVEL                (GADGET_ID_DRAWING_AREA_FIRST + 0)
 #define GADGET_ID_ELEMENT_CONTENT_0    (GADGET_ID_DRAWING_AREA_FIRST + 1)
 #define GADGET_ID_LEVEL_AUTHOR         (GADGET_ID_TEXT_INPUT_FIRST + 1)
 #define GADGET_ID_ELEMENT_NAME         (GADGET_ID_TEXT_INPUT_FIRST + 2)
 
+/* text area identifiers */
+#define GADGET_ID_TEXT_AREA_FIRST      (GADGET_ID_TEXT_INPUT_FIRST + 3)
+
+#define GADGET_ID_ENVELOPE_INFO                (GADGET_ID_TEXT_AREA_FIRST + 0)
+
 /* selectbox identifiers */
-#define GADGET_ID_SELECTBOX_FIRST      (GADGET_ID_TEXT_INPUT_FIRST + 3)
+#define GADGET_ID_SELECTBOX_FIRST      (GADGET_ID_TEXT_AREA_FIRST + 1)
 
 #define GADGET_ID_CUSTOM_WALK_TO_ACTION        (GADGET_ID_SELECTBOX_FIRST + 0)
 #define GADGET_ID_CUSTOM_CONSISTENCY   (GADGET_ID_SELECTBOX_FIRST + 1)
 #define GADGET_ID_CHANGE_COLLIDE_ACTION        (GADGET_ID_SELECTBOX_FIRST + 12)
 #define GADGET_ID_CHANGE_OTHER_ACTION  (GADGET_ID_SELECTBOX_FIRST + 13)
 #define GADGET_ID_CHANGE_POWER         (GADGET_ID_SELECTBOX_FIRST + 14)
+#define GADGET_ID_SELECT_CHANGE_PAGE   (GADGET_ID_SELECTBOX_FIRST + 15)
 
 /* textbutton identifiers */
-#define GADGET_ID_TEXTBUTTON_FIRST     (GADGET_ID_SELECTBOX_FIRST + 15)
+#define GADGET_ID_TEXTBUTTON_FIRST     (GADGET_ID_SELECTBOX_FIRST + 16)
 
 #define GADGET_ID_PROPERTIES_INFO      (GADGET_ID_TEXTBUTTON_FIRST + 0)
 #define GADGET_ID_PROPERTIES_CONFIG    (GADGET_ID_TEXTBUTTON_FIRST + 1)
 #define GADGET_ID_PROPERTIES_ADVANCED  (GADGET_ID_TEXTBUTTON_FIRST + 2)
 #define GADGET_ID_SAVE_AS_TEMPLATE     (GADGET_ID_TEXTBUTTON_FIRST + 3)
+#define GADGET_ID_ADD_CHANGE_PAGE      (GADGET_ID_TEXTBUTTON_FIRST + 4)
+#define GADGET_ID_DEL_CHANGE_PAGE      (GADGET_ID_TEXTBUTTON_FIRST + 5)
+
+/* graphicbutton identifiers */
+#define GADGET_ID_GRAPHICBUTTON_FIRST  (GADGET_ID_TEXTBUTTON_FIRST + 6)
+
+#define GADGET_ID_PREV_CHANGE_PAGE     (GADGET_ID_GRAPHICBUTTON_FIRST + 0)
+#define GADGET_ID_NEXT_CHANGE_PAGE     (GADGET_ID_GRAPHICBUTTON_FIRST + 1)
 
 /* gadgets for scrolling of drawing area */
-#define GADGET_ID_SCROLLING_FIRST      (GADGET_ID_TEXTBUTTON_FIRST + 4)
+#define GADGET_ID_SCROLLING_FIRST      (GADGET_ID_GRAPHICBUTTON_FIRST + 2)
 
 #define GADGET_ID_SCROLL_UP            (GADGET_ID_SCROLLING_FIRST + 0)
 #define GADGET_ID_SCROLL_DOWN          (GADGET_ID_SCROLLING_FIRST + 1)
 #define ED_COUNTER_ID_LEVEL_RANDOM     6
 #define ED_COUNTER_ID_ELEMENT_SCORE    7
 #define ED_COUNTER_ID_ELEMENT_CONTENT  8
-#define ED_COUNTER_ID_CUSTOM_SCORE     9
-#define ED_COUNTER_ID_CUSTOM_GEMCOUNT  10
-#define ED_COUNTER_ID_PUSH_DELAY_FIX   11
-#define ED_COUNTER_ID_PUSH_DELAY_RND   12
-#define ED_COUNTER_ID_MOVE_DELAY_FIX   13
-#define ED_COUNTER_ID_MOVE_DELAY_RND   14
-#define ED_COUNTER_ID_CHANGE_DELAY_FIX 15
-#define ED_COUNTER_ID_CHANGE_DELAY_RND 16
-#define ED_COUNTER_ID_CHANGE_CONT_RND  17
-
-#define ED_NUM_COUNTERBUTTONS          18
+#define ED_COUNTER_ID_ENVELOPE_XSIZE   9
+#define ED_COUNTER_ID_ENVELOPE_YSIZE   10
+#define ED_COUNTER_ID_CUSTOM_SCORE     11
+#define ED_COUNTER_ID_CUSTOM_GEMCOUNT  12
+#define ED_COUNTER_ID_PUSH_DELAY_FIX   13
+#define ED_COUNTER_ID_PUSH_DELAY_RND   14
+#define ED_COUNTER_ID_MOVE_DELAY_FIX   15
+#define ED_COUNTER_ID_MOVE_DELAY_RND   16
+#define ED_COUNTER_ID_CHANGE_DELAY_FIX 17
+#define ED_COUNTER_ID_CHANGE_DELAY_RND 18
+#define ED_COUNTER_ID_CHANGE_CONT_RND  19
+
+#define ED_NUM_COUNTERBUTTONS          20
 
 #define ED_COUNTER_ID_LEVEL_FIRST      ED_COUNTER_ID_LEVEL_XSIZE
 #define ED_COUNTER_ID_LEVEL_LAST       ED_COUNTER_ID_LEVEL_RANDOM
 #define ED_TEXTINPUT_ID_LEVEL_FIRST    ED_TEXTINPUT_ID_LEVEL_NAME
 #define ED_TEXTINPUT_ID_LEVEL_LAST     ED_TEXTINPUT_ID_LEVEL_AUTHOR
 
+/* values for text area gadgets */
+#define ED_TEXTAREA_ID_ENVELOPE_INFO   0
+
+#define ED_NUM_TEXTAREAS                       1
+
+#define ED_TEXTAREA_ID_LEVEL_FIRST     ED_TEXTAREA_ID_ENVELOPE
+#define ED_TEXTAREA_ID_LEVEL_LAST      ED_TEXTAREA_ID_ENVELOPE
+
 /* values for selectbox gadgets */
 #define ED_SELECTBOX_ID_CUSTOM_ACCESS_TYPE     0
 #define ED_SELECTBOX_ID_CUSTOM_ACCESS_LAYER    1
 #define ED_SELECTBOX_ID_CHANGE_COLLIDE_ACTION  12
 #define ED_SELECTBOX_ID_CHANGE_OTHER_ACTION    13
 #define ED_SELECTBOX_ID_CHANGE_POWER           14
+#define ED_SELECTBOX_ID_SELECT_CHANGE_PAGE     15
 
-#define ED_NUM_SELECTBOX                       15
+#define ED_NUM_SELECTBOX                       16
 
 #define ED_SELECTBOX_ID_CUSTOM_FIRST   ED_SELECTBOX_ID_CUSTOM_ACCESS_TYPE
 #define ED_SELECTBOX_ID_CUSTOM_LAST    ED_SELECTBOX_ID_CUSTOM_CONSISTENCY
 
 #define ED_SELECTBOX_ID_CHANGE_FIRST   ED_SELECTBOX_ID_CHANGE_TIME_UNITS
-#define ED_SELECTBOX_ID_CHANGE_LAST    ED_SELECTBOX_ID_CHANGE_POWER
+#define ED_SELECTBOX_ID_CHANGE_LAST    ED_SELECTBOX_ID_SELECT_CHANGE_PAGE
 
 /* values for textbutton gadgets */
 #define ED_TEXTBUTTON_ID_PROPERTIES_INFO       0
 #define ED_TEXTBUTTON_ID_PROPERTIES_CONFIG     1
 #define ED_TEXTBUTTON_ID_PROPERTIES_ADVANCED   2
 #define ED_TEXTBUTTON_ID_SAVE_AS_TEMPLATE      3
+#define ED_TEXTBUTTON_ID_ADD_CHANGE_PAGE       4
+#define ED_TEXTBUTTON_ID_DEL_CHANGE_PAGE       5
 
-#define ED_NUM_TEXTBUTTON                      4
+#define ED_NUM_TEXTBUTTONS                     6
+
+#define ED_TEXTBUTTON_ID_PROPERTIES_FIRST ED_TEXTBUTTON_ID_PROPERTIES_INFO
+#define ED_TEXTBUTTON_ID_PROPERTIES_LAST  ED_TEXTBUTTON_ID_PROPERTIES_ADVANCED
+
+#define ED_TEXTBUTTON_ID_CHANGE_FIRST  ED_TEXTBUTTON_ID_SAVE_AS_TEMPLATE
+#define ED_TEXTBUTTON_ID_CHANGE_LAST   ED_TEXTBUTTON_ID_DEL_CHANGE_PAGE
+
+/* values for graphicbutton gadgets */
+#define ED_GRAPHICBUTTON_ID_PREV_CHANGE_PAGE   0
+#define ED_GRAPHICBUTTON_ID_NEXT_CHANGE_PAGE   1
+
+#define ED_NUM_GRAPHICBUTTONS                  2
+
+#define ED_GRAPHICBUTTON_ID_CHANGE_FIRST   ED_GRAPHICBUTTON_ID_PREV_CHANGE_PAGE
+#define ED_GRAPHICBUTTON_ID_CHANGE_LAST    ED_GRAPHICBUTTON_ID_NEXT_CHANGE_PAGE
 
 /* values for checkbutton gadgets */
 #define ED_CHECKBUTTON_ID_DOUBLE_SPEED         0
@@ -726,6 +766,7 @@ static boolean random_placement_background_restricted = FALSE;
 static boolean stick_element_properties_window = FALSE;
 static boolean custom_element_properties[NUM_ELEMENT_PROPERTIES];
 static boolean custom_element_change_events[NUM_CHANGE_EVENTS];
+static struct ElementChangeInfo custom_element_change;
 static struct ElementInfo custom_element;
 
 static struct
@@ -758,7 +799,7 @@ static struct
     "playfield size:",                 NULL, "width",
   },
   {
-    ED_SETTINGS_XPOS(0) + 2 * DXSIZE,  ED_COUNTER_YPOS(2),
+    -1,                                        ED_COUNTER_YPOS(2),
     MIN_LEV_FIELDY,                    MAX_LEV_FIELDY,
     GADGET_ID_LEVEL_YSIZE_DOWN,                GADGET_ID_LEVEL_YSIZE_UP,
     GADGET_ID_LEVEL_YSIZE_TEXT,                GADGET_ID_LEVEL_XSIZE_UP,
@@ -816,6 +857,22 @@ static struct
     &level.num_yamyam_contents,
     NULL,                              NULL, "number of content areas"
   },
+  {
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(0),
+    MIN_ENVELOPE_XSIZE,                        MAX_ENVELOPE_XSIZE,
+    GADGET_ID_ENVELOPE_XSIZE_DOWN,     GADGET_ID_ENVELOPE_XSIZE_UP,
+    GADGET_ID_ENVELOPE_XSIZE_TEXT,     GADGET_ID_NONE,
+    &level.envelope_xsize,
+    NULL,                              NULL, "width",
+  },
+  {
+    -1,                                        ED_SETTINGS_YPOS(0),
+    MIN_ENVELOPE_YSIZE,                        MAX_ENVELOPE_YSIZE,
+    GADGET_ID_ENVELOPE_YSIZE_DOWN,     GADGET_ID_ENVELOPE_YSIZE_UP,
+    GADGET_ID_ENVELOPE_YSIZE_TEXT,     GADGET_ID_ENVELOPE_XSIZE_UP,
+    &level.envelope_ysize,
+    NULL,                              " ", "height",
+  },
 
   /* ---------- element settings: configure (custom elements) ------------- */
 
@@ -825,10 +882,10 @@ static struct
     GADGET_ID_CUSTOM_SCORE_DOWN,       GADGET_ID_CUSTOM_SCORE_UP,
     GADGET_ID_CUSTOM_SCORE_TEXT,       GADGET_ID_NONE,
     &custom_element.collect_score,
-    NULL,                              "score", NULL
+    NULL,                              "score", " "
   },
   {
-    ED_SETTINGS_XPOS(13) + 10,         ED_SETTINGS_YPOS(3),
+    -1,                                        ED_SETTINGS_YPOS(3),
     MIN_COLLECT_COUNT,                 MAX_COLLECT_COUNT,
     GADGET_ID_CUSTOM_GEMCOUNT_DOWN,    GADGET_ID_CUSTOM_GEMCOUNT_UP,
     GADGET_ID_CUSTOM_GEMCOUNT_TEXT,    GADGET_ID_CUSTOM_SCORE_UP,
@@ -844,7 +901,7 @@ static struct
     NULL,                              "push delay", NULL
   },
   {
-    ED_COUNT_PUSH_DELAY_RND_XPOS,      ED_SETTINGS_YPOS(4),
+    -1,                                        ED_SETTINGS_YPOS(4),
     0,                                 999,
     GADGET_ID_PUSH_DELAY_RND_DOWN,     GADGET_ID_PUSH_DELAY_RND_UP,
     GADGET_ID_PUSH_DELAY_RND_TEXT,     GADGET_ID_PUSH_DELAY_FIX_UP,
@@ -860,7 +917,7 @@ static struct
     NULL,                              "move delay", NULL
   },
   {
-    ED_COUNT_MOVE_DELAY_RND_XPOS,      ED_SETTINGS_YPOS(7),
+    -1,                                        ED_SETTINGS_YPOS(7),
     0,                                 999,
     GADGET_ID_MOVE_DELAY_RND_DOWN,     GADGET_ID_MOVE_DELAY_RND_UP,
     GADGET_ID_MOVE_DELAY_RND_TEXT,     GADGET_ID_MOVE_DELAY_FIX_UP,
@@ -875,15 +932,15 @@ static struct
     0,                                 999,
     GADGET_ID_CHANGE_DELAY_FIX_DOWN,   GADGET_ID_CHANGE_DELAY_FIX_UP,
     GADGET_ID_CHANGE_DELAY_FIX_TEXT,   GADGET_ID_NONE,
-    &custom_element.change.delay_fixed,
+    &custom_element_change.delay_fixed,
     NULL,                              "delay", NULL,
   },
   {
-    ED_COUNT_CHANGE_DELAY_RND_XPOS+20, ED_SETTINGS_YPOS(3),
+    -1,                                        ED_SETTINGS_YPOS(3),
     0,                                 999,
     GADGET_ID_CHANGE_DELAY_RND_DOWN,   GADGET_ID_CHANGE_DELAY_RND_UP,
     GADGET_ID_CHANGE_DELAY_RND_TEXT,   GADGET_ID_CHANGE_DELAY_FIX_UP,
-    &custom_element.change.delay_random,
+    &custom_element_change.delay_random,
     NULL,                              "+random", NULL
   },
   {
@@ -891,7 +948,7 @@ static struct
     0,                                 100,
     GADGET_ID_CHANGE_CONT_RND_DOWN,    GADGET_ID_CHANGE_CONT_RND_UP,
     GADGET_ID_CHANGE_CONT_RND_TEXT,    GADGET_ID_NONE,
-    &custom_element.change.random,
+    &custom_element_change.random,
     NULL,                              "use random change:", "(%)"
   },
 };
@@ -902,7 +959,7 @@ static struct
   int gadget_id;
   int size;
   char *value;
-  char *infotext;
+  char *text_above, *infotext;
 } textinput_info[ED_NUM_TEXTINPUT] =
 {
   {
@@ -910,21 +967,39 @@ static struct
     GADGET_ID_LEVEL_NAME,
     MAX_LEVEL_NAME_LEN,
     level.name,
-    "Title"
+    "Title:", "Title"
   },
   {
     ED_SETTINGS_XPOS(0),               ED_COUNTER_YPOS(1),
     GADGET_ID_LEVEL_AUTHOR,
     MAX_LEVEL_AUTHOR_LEN,
     level.author,
-    "Author"
+    "Author:", "Author"
   },
   {
     5 * MINI_TILEX,                    5 * MINI_TILEY - ED_BORDER_SIZE,
     GADGET_ID_ELEMENT_NAME,
     MAX_ELEMENT_NAME_LEN - 2,          /* currently 2 chars less editable */
     custom_element.description,
-    "Element name"
+    NULL, "Element name"
+  }
+};
+
+static struct
+{
+  int x, y;
+  int gadget_id;
+  int xsize, ysize;
+  char *value;
+  char *text_above, *infotext;
+} textarea_info[ED_NUM_TEXTAREAS] =
+{
+  {
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(2),
+    GADGET_ID_ENVELOPE_INFO,
+    MAX_ENVELOPE_XSIZE, MAX_ENVELOPE_YSIZE,
+    level.envelope,
+    "Envelope Info:", "Envelope Info"
   }
 };
 
@@ -1028,7 +1103,7 @@ static struct ValueTextInfo options_consistency[] =
 
 static struct ValueTextInfo options_time_units[] =
 {
-  { 50,                                "seconds"                       },
+  { FRAMES_PER_SECOND,         "seconds"                       },
   { 1,                         "frames"                        },
   { -1,                                NULL                            }
 };
@@ -1071,6 +1146,12 @@ static struct ValueTextInfo options_change_power[] =
   { -1,                                NULL                            }
 };
 
+static char options_change_page_strings[MAX_CHANGE_PAGES][10];
+static struct ValueTextInfo options_change_page[MAX_CHANGE_PAGES + 1] =
+{
+  { -1,                                NULL                            }
+};
+
 static struct
 {
   int x, y;
@@ -1093,7 +1174,7 @@ static struct
     "player can", NULL, "type of access to this field"
   },
   {
-    ED_SETTINGS_XPOS(11),              ED_SETTINGS_YPOS(1),
+    -1,                                        ED_SETTINGS_YPOS(1),
     GADGET_ID_CUSTOM_ACCESS_LAYER,     GADGET_ID_CUSTOM_ACCESS_TYPE,
     -1,
     options_access_layer,
@@ -1133,7 +1214,7 @@ static struct
     "move/fall speed", NULL, "speed of element movement"
   },
   {
-    ED_SETTINGS_XPOS(7),               ED_SETTINGS_YPOS(9),
+    -1,                                        ED_SETTINGS_YPOS(9),
     GADGET_ID_CUSTOM_SMASH_TARGETS,    GADGET_ID_CUSTOM_CAN_SMASH,
     -1,
     options_smash_targets,
@@ -1172,7 +1253,7 @@ static struct
     GADGET_ID_CHANGE_TIME_UNITS,       GADGET_ID_NONE,
     -1,
     options_time_units,
-    &custom_element.change.delay_frames,
+    &custom_element_change.delay_frames,
     "delay time given in", NULL, "delay time units for change"
   },
   {
@@ -1180,7 +1261,7 @@ static struct
     GADGET_ID_CHANGE_PLAYER_ACTION,    GADGET_ID_NONE,
     -1,
     options_change_player_action,
-    &custom_element.change_player_action,
+    &custom_element_change.player_action,
     NULL, "by player", "type of player contact"
   },
   {
@@ -1188,7 +1269,7 @@ static struct
     GADGET_ID_CHANGE_COLLIDE_ACTION,   GADGET_ID_NONE,
     -1,
     options_change_collide_action,
-    &custom_element.change_collide_action,
+    &custom_element_change.collide_action,
     NULL, NULL, "change after impact or smash"
   },
   {
@@ -1196,7 +1277,7 @@ static struct
     GADGET_ID_CHANGE_OTHER_ACTION,     GADGET_ID_NONE,
     -1,
     options_change_other_action,
-    &custom_element.change_other_action,
+    &custom_element_change.other_action,
     NULL, "element:", "type of other element action"
   },
   {
@@ -1204,9 +1285,17 @@ static struct
     GADGET_ID_CHANGE_POWER,            GADGET_ID_NONE,
     -1,
     options_change_power,
-    &custom_element.change.power,
+    &custom_element_change.power,
     "power:", NULL, "power of extended change"
   },
+  {
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(14),
+    GADGET_ID_SELECT_CHANGE_PAGE,      GADGET_ID_NONE,
+    3,
+    options_change_page,
+    &custom_element.current_change_page,
+    NULL, NULL, "element config page"
+  },
 };
 
 static struct
@@ -1215,28 +1304,71 @@ static struct
   int gadget_id;
   int gadget_id_align;
   int size;
-  char *text, *infotext;
-} textbutton_info[ED_NUM_TEXTBUTTON] =
+  char *text;
+  char *text_left, *text_right, *infotext;
+} textbutton_info[ED_NUM_TEXTBUTTONS] =
 {
   {
     ED_SETTINGS_XPOS(0),               ED_COUNTER_YPOS(1),
     GADGET_ID_PROPERTIES_INFO,         GADGET_ID_NONE,
-    11, "Information",                 "Show information about element"
+    11,                                        "Information",                  
+    NULL, NULL,                                "Show information about element"
   },
   {
     ED_SETTINGS_XPOS(0) + 166,         ED_COUNTER_YPOS(1),
     GADGET_ID_PROPERTIES_CONFIG,       GADGET_ID_NONE,
-    11, "Configure",                   "Configure element properties"
+    11,                                        "Configure",
+    NULL, NULL,                                "Configure element properties"
   },
   {
     ED_SETTINGS_XPOS(0) + 332,         ED_COUNTER_YPOS(1),
     GADGET_ID_PROPERTIES_ADVANCED,     GADGET_ID_NONE,
-    11, "Advanced",                    "Advanced element configuration"
+    11,                                        "Advanced",
+    NULL, NULL,                                "Advanced element configuration"
   },
   {
-    ED_SETTINGS_XPOS(0) + 262,         ED_SETTINGS_YPOS(13),
+    -1,                                        ED_SETTINGS_YPOS(13),
     GADGET_ID_SAVE_AS_TEMPLATE,                GADGET_ID_CUSTOM_USE_TEMPLATE,
-    -1, "Save as template",            "Save current settings as new template"
+    -1,                                        "Save as template",
+    " ", NULL,                         "Save current settings as new template"
+  },
+  {
+    -1,                                        ED_SETTINGS_YPOS(14),
+    GADGET_ID_ADD_CHANGE_PAGE,         GADGET_ID_NEXT_CHANGE_PAGE,
+    -1,                                        "New",
+    " ", NULL,                         "Add new config page"
+  },
+  {
+    -1,                                        ED_SETTINGS_YPOS(14),
+    GADGET_ID_DEL_CHANGE_PAGE,         GADGET_ID_ADD_CHANGE_PAGE,
+    -1,                                        "Delete",
+    NULL, NULL,                                "Delete current config page"
+  },
+};
+
+static struct
+{
+  int gd_x, gd_y;
+  int x, y;
+  int width, height;
+  int gadget_id;
+  int gadget_id_align;
+  char *text_left, *text_right, *infotext;
+} graphicbutton_info[ED_NUM_GRAPHICBUTTONS] =
+{
+  {
+    ED_BUTTON_MINUS_XPOS,              ED_BUTTON_COUNT_YPOS,
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(14),
+    ED_BUTTON_COUNT_XSIZE,             ED_BUTTON_COUNT_YSIZE,
+    GADGET_ID_PREV_CHANGE_PAGE,                GADGET_ID_NONE,
+    NULL, NULL,                                "select previous config page"
+  },
+  {
+    ED_BUTTON_PLUS_XPOS,               ED_BUTTON_COUNT_YPOS,
+    -1,                                        ED_SETTINGS_YPOS(14),
+    ED_BUTTON_COUNT_XSIZE,             ED_BUTTON_COUNT_YSIZE,
+    GADGET_ID_NEXT_CHANGE_PAGE,                GADGET_ID_SELECT_CHANGE_PAGE,
+    NULL, "config page",               "select next config page"
   },
 };
 
@@ -1280,10 +1412,10 @@ static struct
   },
   {
     ED_SCROLLBUTTON2_XPOS,  ED_SCROLLBUTTON2_YPOS + 1 * ED_SCROLLBUTTON2_YSIZE,
-    ED_SCROLL2_DOWN_XPOS,    ED_SCROLL2_DOWN_YPOS,
+    ED_SCROLL2_DOWN_XPOS,   ED_SCROLL2_DOWN_YPOS,
     GADGET_ID_SCROLL_LIST_DOWN,
     "scroll element list down ('Page Down')"
-  }
+  },
 };
 
 static struct
@@ -1334,14 +1466,14 @@ static struct
 } radiobutton_info[ED_NUM_RADIOBUTTONS] =
 {
   {
-    ED_SETTINGS_XPOS(0) + 160,         ED_COUNTER2_YPOS(8),
+    -1,                                        ED_COUNTER2_YPOS(8),
     GADGET_ID_RANDOM_PERCENTAGE,       GADGET_ID_LEVEL_RANDOM_UP,
     RADIO_NR_RANDOM_ELEMENTS,
     &random_placement_method,          RANDOM_USE_PERCENTAGE,
     " ", "percentage",                 "use percentage for random elements"
   },
   {
-    ED_SETTINGS_XPOS(0) + 340,         ED_COUNTER2_YPOS(8),
+    -1,                                        ED_COUNTER2_YPOS(8),
     GADGET_ID_RANDOM_QUANTITY,         GADGET_ID_RANDOM_PERCENTAGE,
     RADIO_NR_RANDOM_ELEMENTS,
     &random_placement_method,          RANDOM_USE_QUANTITY,
@@ -1367,7 +1499,7 @@ static struct
     NULL, "double speed movement",     "set movement speed of player"
   },
   {
-    ED_SETTINGS_XPOS(0) + 340,         ED_COUNTER_YPOS(6) - MINI_TILEY,
+    -1,                                        ED_COUNTER_YPOS(6) - MINI_TILEY,
     GADGET_ID_GRAVITY,                 GADGET_ID_DOUBLE_SPEED,
     &level.gravity,
     " ", "gravity",                    "set level gravity"
@@ -1424,7 +1556,7 @@ static struct
     NULL, "can fall",                  "element can fall down"
   },
   {
-    ED_SETTINGS_XPOS(6),               ED_SETTINGS_YPOS(9),
+    -1,                                        ED_SETTINGS_YPOS(9),
     GADGET_ID_CUSTOM_CAN_SMASH,                GADGET_ID_CUSTOM_CAN_FALL,
     &custom_element_properties[EP_CAN_SMASH],
     " ", NULL,                         "element can smash other elements"
@@ -1454,13 +1586,13 @@ static struct
     NULL, "by fire",                   "element can explode by fire/explosion"
   },
   {
-    ED_SETTINGS_XPOS(7),               ED_SETTINGS_YPOS(13),
+    -1,                                        ED_SETTINGS_YPOS(13),
     GADGET_ID_CUSTOM_EXPLODE_SMASH,    GADGET_ID_CUSTOM_EXPLODE_FIRE,
     &custom_element.can_explode_smashed,
     " ", "smashed",                    "element can explode when smashed"
   },
   {
-    ED_SETTINGS_XPOS(13),              ED_SETTINGS_YPOS(13),
+    -1,                                        ED_SETTINGS_YPOS(13),
     GADGET_ID_CUSTOM_EXPLODE_IMPACT,   GADGET_ID_CUSTOM_EXPLODE_SMASH,
     &custom_element.can_explode_impact,
     " ", "impact",                     "element can explode on impact"
@@ -1507,25 +1639,25 @@ static struct
   {
     ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(8),
     GADGET_ID_CHANGE_USE_EXPLOSION,    GADGET_ID_NONE,
-    &custom_element.change.explode,
+    &custom_element_change.explode,
     NULL, "explode instead of change", "element explodes instead of change"
   },
   {
     ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(9),
     GADGET_ID_CHANGE_USE_CONTENT,      GADGET_ID_NONE,
-    &custom_element.change.use_content,
+    &custom_element_change.use_content,
     NULL, "use extended change target:","element changes to more elements"
   },
   {
     ED_SETTINGS_XPOS(2),               ED_SETTINGS_YPOS(11),
     GADGET_ID_CHANGE_ONLY_COMPLETE,    GADGET_ID_NONE,
-    &custom_element.change.only_complete,
+    &custom_element_change.only_complete,
     NULL, "only use complete change",  "only use complete extended content"
   },
   {
     ED_SETTINGS_XPOS(2),               ED_SETTINGS_YPOS(12),
     GADGET_ID_CHANGE_USE_RANDOM,       GADGET_ID_NONE,
-    &custom_element.change.use_random_change,
+    &custom_element_change.use_random_change,
     NULL, NULL,                                "use random value for new content"
   },
   {
@@ -1617,7 +1749,7 @@ static struct
   /* ---------- custom graphic --------------------------------------------- */
 
   {
-    ED_AREA_ELEM_CONTENT3_XPOS,                ED_AREA_ELEM_CONTENT3_YPOS,
+    -1,                                        ED_AREA_ELEM_CONTENT3_YPOS,
     1, 1,
     GADGET_ID_CUSTOM_GRAPHIC,          GADGET_ID_CUSTOM_USE_GRAPHIC,
     NULL, NULL,                                NULL
@@ -1635,7 +1767,7 @@ static struct
   /* ---------- custom change target --------------------------------------- */
 
   {
-    ED_AREA_ELEM_CONTENT2_XPOS,                ED_AREA_ELEM_CONTENT2_YPOS,
+    -1,                                        ED_AREA_ELEM_CONTENT2_YPOS,
     1, 1,
     GADGET_ID_CUSTOM_CHANGE_TARGET,    GADGET_ID_CUSTOM_CAN_CHANGE,
     NULL, "after/when:",               NULL
@@ -1653,7 +1785,7 @@ static struct
   /* ---------- custom change trigger (element causing change) ------------- */
 
   {
-    ED_AREA_ELEM_CONTENT5_XPOS,                ED_AREA_ELEM_CONTENT5_YPOS,
+    -1,                                        ED_AREA_ELEM_CONTENT5_YPOS,
     1, 1,
     GADGET_ID_CUSTOM_CHANGE_TRIGGER,   GADGET_ID_CHANGE_OTHER_ACTION,
     NULL, NULL,                                NULL
@@ -1662,7 +1794,7 @@ static struct
   /* ---------- random background (for random painting) -------------------- */
 
   {
-    ED_AREA_RANDOM_BACKGROUND_XPOS,    ED_AREA_RANDOM_BACKGROUND_YPOS,
+    -1,                                        ED_AREA_RANDOM_BACKGROUND_YPOS,
     1, 1,
     GADGET_ID_RANDOM_BACKGROUND,       GADGET_ID_RANDOM_RESTRICTED,
     NULL, NULL,                                NULL
@@ -1708,8 +1840,10 @@ static void CopyLevelToUndoBuffer(int);
 static void HandleDrawingAreas(struct GadgetInfo *);
 static void HandleCounterButtons(struct GadgetInfo *);
 static void HandleTextInputGadgets(struct GadgetInfo *);
+static void HandleTextAreaGadgets(struct GadgetInfo *);
 static void HandleSelectboxGadgets(struct GadgetInfo *);
 static void HandleTextbuttonGadgets(struct GadgetInfo *);
+static void HandleGraphicbuttonGadgets(struct GadgetInfo *);
 static void HandleRadiobuttons(struct GadgetInfo *);
 static void HandleCheckbuttons(struct GadgetInfo *);
 static void HandleControlButtons(struct GadgetInfo *);
@@ -2834,16 +2968,16 @@ static void DrawDrawingArea(int id)
                           el2edimg(custom_element.content[x][y]));
   else if (id == ED_DRAWING_ID_CUSTOM_CHANGE_TARGET)
     DrawMiniGraphicExt(drawto, gi->x, gi->y,
-                      el2edimg(custom_element.change.target_element));
+                      el2edimg(custom_element_change.target_element));
   else if (id == ED_DRAWING_ID_CUSTOM_CHANGE_CONTENT)
     for (y=0; y < 3; y++)
       for (x=0; x < 3; x++)
        DrawMiniGraphicExt(drawto,
                           gi->x + x * MINI_TILEX, gi->y + y * MINI_TILEY,
-                          el2edimg(custom_element.change.content[x][y]));
+                          el2edimg(custom_element_change.content[x][y]));
   else if (id == ED_DRAWING_ID_CUSTOM_CHANGE_TRIGGER)
     DrawMiniGraphicExt(drawto, gi->x, gi->y,
-                      el2edimg(custom_element.change.trigger_element));
+                      el2edimg(custom_element_change.trigger_element));
   else if (id >= ED_DRAWING_ID_ELEMENT_CONTENT_0 &&
           id <= ED_DRAWING_ID_ELEMENT_CONTENT_7)
   {
@@ -3221,7 +3355,7 @@ static void CreateCounterButtons()
                          GDI_INFO_TEXT, "enter counter value",
                          GDI_X, x,
                          GDI_Y, y,
-                         GDI_TYPE, GD_TYPE_TEXTINPUT_NUMERIC,
+                         GDI_TYPE, GD_TYPE_TEXT_INPUT_NUMERIC,
                          GDI_NUMBER_VALUE, 0,
                          GDI_NUMBER_MIN, counterbutton_info[i].min_value,
                          GDI_NUMBER_MAX, counterbutton_info[i].max_value,
@@ -3325,7 +3459,7 @@ static void CreateTextInputGadgets()
                      GDI_INFO_TEXT, infotext,
                      GDI_X, SX + textinput_info[i].x,
                      GDI_Y, SY + textinput_info[i].y,
-                     GDI_TYPE, GD_TYPE_TEXTINPUT_ALPHANUMERIC,
+                     GDI_TYPE, GD_TYPE_TEXT_INPUT_ALPHANUMERIC,
                      GDI_TEXT_VALUE, textinput_info[i].value,
                      GDI_TEXT_SIZE, textinput_info[i].size,
                      GDI_TEXT_FONT, FONT_INPUT_1,
@@ -3346,6 +3480,55 @@ static void CreateTextInputGadgets()
   }
 }
 
+static void CreateTextAreaGadgets()
+{
+  int max_infotext_len = getMaxInfoTextLength();
+  int i;
+
+  for (i=0; i<ED_NUM_TEXTAREAS; i++)
+  {
+    Bitmap *gd_bitmap = graphic_info[IMG_GLOBAL_DOOR].bitmap;
+    int gd_x, gd_y;
+    struct GadgetInfo *gi;
+    unsigned long event_mask;
+    char infotext[MAX_OUTPUT_LINESIZE + 1];
+    int id = textarea_info[i].gadget_id;
+    int area_xsize = textarea_info[i].xsize;
+    int area_ysize = textarea_info[i].ysize;
+
+    event_mask = GD_EVENT_TEXT_LEAVING;
+
+    gd_x = DOOR_GFX_PAGEX4 + ED_WIN_COUNT_XPOS;
+    gd_y = DOOR_GFX_PAGEY1 + ED_WIN_COUNT_YPOS;
+
+    sprintf(infotext, "Enter %s", textarea_info[i].infotext);
+    infotext[max_infotext_len] = '\0';
+
+    gi = CreateGadget(GDI_CUSTOM_ID, id,
+                     GDI_CUSTOM_TYPE_ID, i,
+                     GDI_INFO_TEXT, infotext,
+                     GDI_X, SX + textarea_info[i].x,
+                     GDI_Y, SY + textarea_info[i].y,
+                     GDI_TYPE, GD_TYPE_TEXT_AREA,
+                     GDI_AREA_SIZE, area_xsize, area_ysize,
+                     GDI_TEXT_FONT, FONT_INPUT_1,
+                     GDI_TEXT_FONT_ACTIVE, FONT_INPUT_1_ACTIVE,
+                     GDI_DESIGN_UNPRESSED, gd_bitmap, gd_x, gd_y,
+                     GDI_DESIGN_PRESSED, gd_bitmap, gd_x, gd_y,
+                     GDI_BORDER_SIZE, ED_BORDER_SIZE, ED_BORDER_SIZE,
+                     GDI_DESIGN_WIDTH, ED_WIN_COUNT_XSIZE,
+                     GDI_EVENT_MASK, event_mask,
+                     GDI_CALLBACK_INFO, HandleEditorGadgetInfoText,
+                     GDI_CALLBACK_ACTION, HandleTextAreaGadgets,
+                     GDI_END);
+
+    if (gi == NULL)
+      Error(ERR_EXIT, "cannot create gadget");
+
+    level_editor_gadget[id] = gi;
+  }
+}
+
 static void CreateSelectboxGadgets()
 {
   int max_infotext_len = getMaxInfoTextLength();
@@ -3428,7 +3611,7 @@ static void CreateTextbuttonGadgets()
   int max_infotext_len = getMaxInfoTextLength();
   int i;
 
-  for (i=0; i<ED_NUM_TEXTBUTTON; i++)
+  for (i=0; i<ED_NUM_TEXTBUTTONS; i++)
   {
     Bitmap *gd_bitmap = graphic_info[IMG_GLOBAL_DOOR].bitmap;
     int gd_x1, gd_x2, gd_y1, gd_y2;
@@ -3467,6 +3650,10 @@ static void CreateTextbuttonGadgets()
       x = (right_gadget_border[textbutton_info[i].gadget_id_align] +
           ED_GADGET_TEXT_DISTANCE);
 
+    /* determine horizontal offset for leading text */
+    if (textbutton_info[i].text_left != NULL)
+      x += getTextWidthForGadget(textbutton_info[i].text_left);
+
     gi = CreateGadget(GDI_CUSTOM_ID, id,
                      GDI_CUSTOM_TYPE_ID, i,
                      GDI_INFO_TEXT, infotext,
@@ -3492,6 +3679,64 @@ static void CreateTextbuttonGadgets()
       Error(ERR_EXIT, "cannot create gadget");
 
     level_editor_gadget[id] = gi;
+    right_gadget_border[id] =
+      getRightGadgetBorder(gi, textbutton_info[i].text_right);
+  }
+}
+
+static void CreateGraphicbuttonGadgets()
+{
+  Bitmap *gd_bitmap = graphic_info[IMG_GLOBAL_DOOR].bitmap;
+  struct GadgetInfo *gi;
+  unsigned long event_mask;
+  int i;
+
+  /* create buttons for scrolling of drawing area and element list */
+  for (i=0; i < ED_NUM_GRAPHICBUTTONS; i++)
+  {
+    int id = graphicbutton_info[i].gadget_id;
+    int gd_x1, gd_x2, gd_y1, gd_y2;
+    int x = SX + graphicbutton_info[i].x;
+    int y = SY + graphicbutton_info[i].y;
+
+    event_mask = GD_EVENT_PRESSED | GD_EVENT_REPEATED;
+
+    gd_x1 = DOOR_GFX_PAGEX4 + graphicbutton_info[i].gd_x;
+    gd_x2 = DOOR_GFX_PAGEX3 + graphicbutton_info[i].gd_x;
+    gd_y1 = DOOR_GFX_PAGEY1 + graphicbutton_info[i].gd_y;
+    gd_y2 = gd_y1;
+
+    /* determine horizontal position to the right of specified gadget */
+    if (graphicbutton_info[i].gadget_id_align != GADGET_ID_NONE)
+      x = (right_gadget_border[graphicbutton_info[i].gadget_id_align] +
+          ED_GADGET_TEXT_DISTANCE);
+
+    /* determine horizontal offset for leading text */
+    if (graphicbutton_info[i].text_left != NULL)
+      x += getTextWidthForGadget(graphicbutton_info[i].text_left);
+
+    gi = CreateGadget(GDI_CUSTOM_ID, id,
+                     GDI_CUSTOM_TYPE_ID, i,
+                     GDI_INFO_TEXT, graphicbutton_info[i].infotext,
+                     GDI_X, x,
+                     GDI_Y, y,
+                     GDI_WIDTH, graphicbutton_info[i].width,
+                     GDI_HEIGHT, graphicbutton_info[i].height,
+                     GDI_TYPE, GD_TYPE_NORMAL_BUTTON,
+                     GDI_STATE, GD_BUTTON_UNPRESSED,
+                     GDI_DESIGN_UNPRESSED, gd_bitmap, gd_x1, gd_y1,
+                     GDI_DESIGN_PRESSED, gd_bitmap, gd_x2, gd_y2,
+                     GDI_EVENT_MASK, event_mask,
+                     GDI_CALLBACK_INFO, HandleEditorGadgetInfoText,
+                     GDI_CALLBACK_ACTION, HandleGraphicbuttonGadgets,
+                     GDI_END);
+
+    if (gi == NULL)
+      Error(ERR_EXIT, "cannot create gadget");
+
+    level_editor_gadget[id] = gi;
+    right_gadget_border[id] =
+      getRightGadgetBorder(gi, graphicbutton_info[i].text_right);
   }
 }
 
@@ -3707,8 +3952,10 @@ void CreateLevelEditorGadgets()
   CreateCounterButtons();
   CreateRadiobuttonGadgets();
   CreateTextInputGadgets();
-  CreateTextbuttonGadgets();
+  CreateTextAreaGadgets();
   CreateSelectboxGadgets();
+  CreateGraphicbuttonGadgets();
+  CreateTextbuttonGadgets();
   CreateDrawingAreas();
 
   game_status = old_game_status;
@@ -3823,25 +4070,35 @@ static void MapDrawingArea(int id)
 static void MapTextInputGadget(int id)
 {
   struct GadgetInfo *gi = level_editor_gadget[textinput_info[id].gadget_id];
-  char infotext[MAX_OUTPUT_LINESIZE + 1];
-  int max_infotext_len = getMaxInfoTextLength();
   int xoffset_above = 0;
   int yoffset_above = -(MINI_TILEX + ED_GADGET_DISTANCE);
-  int x = textinput_info[id].x + xoffset_above;
-  int y = textinput_info[id].y + yoffset_above;
+  int x_above = textinput_info[id].x + xoffset_above;
+  int y_above = textinput_info[id].y + yoffset_above;
 
-  if (textinput_info[id].infotext)
-  {
-    sprintf(infotext, "%s:", textinput_info[id].infotext);
-    infotext[max_infotext_len] = '\0';
-    DrawTextF(x, y, FONT_TEXT_1, infotext);
-  }
+  if (textinput_info[id].text_above)
+    DrawTextF(x_above, y_above, FONT_TEXT_1, textinput_info[id].text_above);
 
   ModifyGadget(gi, GDI_TEXT_VALUE, textinput_info[id].value, GDI_END);
 
   MapGadget(gi);
 }
 
+static void MapTextAreaGadget(int id)
+{
+  struct GadgetInfo *gi = level_editor_gadget[textarea_info[id].gadget_id];
+  int xoffset_above = 0;
+  int yoffset_above = -(MINI_TILEX + ED_GADGET_DISTANCE);
+  int x_above = textarea_info[id].x + xoffset_above;
+  int y_above = textarea_info[id].y + yoffset_above;
+
+  if (textarea_info[id].text_above)
+    DrawTextF(x_above, y_above, FONT_TEXT_1, textarea_info[id].text_above);
+
+  ModifyGadget(gi, GDI_TEXT_VALUE, textarea_info[id].value, GDI_END);
+
+  MapGadget(gi);
+}
+
 static void MapSelectboxGadget(int id)
 {
   struct GadgetInfo *gi = level_editor_gadget[selectbox_info[id].gadget_id];
@@ -3866,6 +4123,42 @@ static void MapSelectboxGadget(int id)
 static void MapTextbuttonGadget(int id)
 {
   struct GadgetInfo *gi = level_editor_gadget[textbutton_info[id].gadget_id];
+  int xoffset_left = getTextWidthForGadget(textbutton_info[id].text_left);
+  int xoffset_right = ED_GADGET_TEXT_DISTANCE;
+  int yoffset = ED_BORDER_SIZE;
+  int x_left = gi->x - xoffset_left;
+  int x_right = gi->x + gi->width + xoffset_right;
+  int y = gi->y + yoffset;
+
+  /* only show button to delete change pages when more than minimum pages */
+  if (id == ED_TEXTBUTTON_ID_DEL_CHANGE_PAGE &&
+      custom_element.num_change_pages == MIN_CHANGE_PAGES)
+    return;
+
+  if (textbutton_info[id].text_left)
+    DrawText(x_left, y, textbutton_info[id].text_left, FONT_TEXT_1);
+
+  if (textbutton_info[id].text_right)
+    DrawText(x_right, y, textbutton_info[id].text_right, FONT_TEXT_1);
+
+  MapGadget(gi);
+}
+
+static void MapGraphicbuttonGadget(int id)
+{
+  struct GadgetInfo *gi= level_editor_gadget[graphicbutton_info[id].gadget_id];
+  int xoffset_left = getTextWidthForGadget(graphicbutton_info[id].text_left);
+  int xoffset_right = ED_GADGET_TEXT_DISTANCE;
+  int yoffset = ED_BORDER_SIZE;
+  int x_left = gi->x - xoffset_left;
+  int x_right = gi->x + gi->width + xoffset_right;
+  int y = gi->y + yoffset;
+
+  if (graphicbutton_info[id].text_left)
+    DrawText(x_left, y, graphicbutton_info[id].text_left, FONT_TEXT_1);
+
+  if (graphicbutton_info[id].text_right)
+    DrawText(x_right, y, graphicbutton_info[id].text_right, FONT_TEXT_1);
 
   MapGadget(gi);
 }
@@ -3873,19 +4166,12 @@ static void MapTextbuttonGadget(int id)
 static void MapRadiobuttonGadget(int id)
 {
   struct GadgetInfo *gi = level_editor_gadget[radiobutton_info[id].gadget_id];
-#if 0
-  int xoffset_right = ED_XOFFSET_CHECKBOX;
-  int yoffset_right = ED_BORDER_SIZE;
-  int x = radiobutton_info[id].x + xoffset_right;
-  int y = radiobutton_info[id].y + yoffset_right;
-#else
   int xoffset_left = getTextWidthForGadget(checkbutton_info[id].text_left);
   int xoffset_right = ED_GADGET_TEXT_DISTANCE;
   int yoffset = ED_BORDER_SIZE;
   int x_left = gi->x - xoffset_left;
   int x_right = gi->x + gi->width + xoffset_right;
   int y = gi->y + yoffset;
-#endif
   boolean checked =
     (*radiobutton_info[id].value == radiobutton_info[id].checked_value);
 
@@ -3903,19 +4189,12 @@ static void MapRadiobuttonGadget(int id)
 static void MapCheckbuttonGadget(int id)
 {
   struct GadgetInfo *gi = level_editor_gadget[checkbutton_info[id].gadget_id];
-#if 0
-  int xoffset_right = ED_XOFFSET_CHECKBOX;
-  int yoffset_right = ED_BORDER_SIZE;
-  int x = checkbutton_info[id].x + xoffset_right;
-  int y = checkbutton_info[id].y + yoffset_right;
-#else
   int xoffset_left = getTextWidthForGadget(checkbutton_info[id].text_left);
   int xoffset_right = ED_GADGET_TEXT_DISTANCE;
   int yoffset = ED_BORDER_SIZE;
   int x_left = gi->x - xoffset_left;
   int x_right = gi->x + gi->width + xoffset_right;
   int y = gi->y + yoffset;
-#endif
 
   /* special case needed for "sticky" gadget */
   ModifyGadget(gi, GDI_CHECKED, *checkbutton_info[id].value,
@@ -4041,7 +4320,7 @@ static void CopyPlayfield(short src[MAX_LEV_FIELDX][MAX_LEV_FIELDY],
       dst[x][y] = src[x][y];
 }
 
-static int SetSelectboxValue(int selectbox_id, int new_value)
+static int setSelectboxValue(int selectbox_id, int new_value)
 {
   int new_index_value = 0;
   int i;
@@ -4059,15 +4338,32 @@ static int SetSelectboxValue(int selectbox_id, int new_value)
 static void CopyCustomElementPropertiesToEditor(int element)
 {
   int i;
+  int current_change_page = element_info[element].current_change_page;
+
+  /* dynamically (re)build selectbox for selecting change page */
+  for (i=0; i < element_info[element].num_change_pages; i++)
+  {
+    sprintf(options_change_page_strings[i], "%d", i + 1);
+
+    options_change_page[i].value = i;
+    options_change_page[i].text = options_change_page_strings[i];
+  }
+
+  options_change_page[i].value = -1;
+  options_change_page[i].text = NULL;
 
   /* needed here to initialize combined element properties */
   InitElementPropertiesEngine(level.game_version);
 
+  element_info[element].change =
+    &element_info[element].change_page[current_change_page];
+
   custom_element = element_info[element];
+  custom_element_change = *element_info[element].change;
 
   /* needed to initially set selectbox value variables to reliable defaults */
   for (i=0; i < ED_NUM_SELECTBOX; i++)
-    SetSelectboxValue(i, *selectbox_info[i].value);
+    setSelectboxValue(i, *selectbox_info[i].value);
 
   for (i=0; i < NUM_ELEMENT_PROPERTIES; i++)
     custom_element_properties[i] = HAS_PROPERTY(element, i);
@@ -4149,22 +4445,22 @@ static void CopyCustomElementPropertiesToEditor(int element)
   /* ---------- element settings: advanced (custom elements) --------------- */
 
   /* set change by player selectbox help value */
-  custom_element.change_player_action =
+  custom_element_change.player_action =
     (HAS_CHANGE_EVENT(element, CE_DROPPED_BY_PLAYER) ? CE_DROPPED_BY_PLAYER :
      HAS_CHANGE_EVENT(element, CE_PUSHED_BY_PLAYER) ? CE_PUSHED_BY_PLAYER :
      HAS_CHANGE_EVENT(element, CE_PRESSED_BY_PLAYER) ? CE_PRESSED_BY_PLAYER :
      HAS_CHANGE_EVENT(element, CE_TOUCHED_BY_PLAYER) ? CE_TOUCHED_BY_PLAYER :
-     custom_element.change_player_action);
+     custom_element_change.player_action);
 
   /* set change by collision selectbox help value */
-  custom_element.change_collide_action =
+  custom_element_change.collide_action =
     (HAS_CHANGE_EVENT(element, CE_SMASHED) ? CE_SMASHED :
      HAS_CHANGE_EVENT(element, CE_IMPACT) ? CE_IMPACT :
      HAS_CHANGE_EVENT(element, CE_COLLISION) ? CE_COLLISION :
-     custom_element.change_collide_action);
+     custom_element_change.collide_action);
 
   /* set change by other element action selectbox help value */
-  custom_element.change_other_action =
+  custom_element_change.other_action =
     (HAS_CHANGE_EVENT(element, CE_OTHER_GETS_DROPPED) ? CE_OTHER_GETS_DROPPED :
      HAS_CHANGE_EVENT(element, CE_OTHER_GETS_COLLECTED) ? CE_OTHER_GETS_COLLECTED :
      HAS_CHANGE_EVENT(element, CE_OTHER_GETS_PUSHED) ? CE_OTHER_GETS_PUSHED :
@@ -4173,7 +4469,7 @@ static void CopyCustomElementPropertiesToEditor(int element)
      HAS_CHANGE_EVENT(element, CE_OTHER_IS_EXPLODING) ? CE_OTHER_IS_EXPLODING :
      HAS_CHANGE_EVENT(element, CE_OTHER_IS_CHANGING) ? CE_OTHER_IS_CHANGING :
      HAS_CHANGE_EVENT(element, CE_OTHER_IS_TOUCHING) ? CE_OTHER_IS_TOUCHING :
-     custom_element.change_other_action);
+     custom_element_change.other_action);
 }
 
 static void CopyCustomElementPropertiesToGame(int element)
@@ -4201,6 +4497,7 @@ static void CopyCustomElementPropertiesToGame(int element)
   }
 
   element_info[element] = custom_element;
+  *element_info[element].change = custom_element_change;
 
   /* ---------- element settings: configure (custom elements) ------------- */
 
@@ -4268,14 +4565,14 @@ static void CopyCustomElementPropertiesToGame(int element)
   custom_element_change_events[CE_PRESSED_BY_PLAYER] = FALSE;
   custom_element_change_events[CE_PUSHED_BY_PLAYER] = FALSE;
   custom_element_change_events[CE_DROPPED_BY_PLAYER] = FALSE;
-  custom_element_change_events[custom_element.change_player_action] =
+  custom_element_change_events[custom_element_change.player_action] =
     custom_element_change_events[CE_BY_PLAYER];
 
   /* set collision change event from checkbox and selectbox */
   custom_element_change_events[CE_COLLISION] = FALSE;
   custom_element_change_events[CE_IMPACT] = FALSE;
   custom_element_change_events[CE_SMASHED] = FALSE;
-  custom_element_change_events[custom_element.change_collide_action] =
+  custom_element_change_events[custom_element_change.collide_action] =
     custom_element_change_events[CE_BY_COLLISION];
 
   /* set other element action change event from checkbox and selectbox */
@@ -4287,7 +4584,7 @@ static void CopyCustomElementPropertiesToGame(int element)
   custom_element_change_events[CE_OTHER_GETS_PUSHED] = FALSE;
   custom_element_change_events[CE_OTHER_GETS_COLLECTED] = FALSE;
   custom_element_change_events[CE_OTHER_GETS_DROPPED] = FALSE;
-  custom_element_change_events[custom_element.change_other_action] =
+  custom_element_change_events[custom_element_change.other_action] =
     custom_element_change_events[CE_BY_OTHER];
 
   for (i=0; i < NUM_ELEMENT_PROPERTIES; i++)
@@ -4298,6 +4595,7 @@ static void CopyCustomElementPropertiesToGame(int element)
 
   /* copy change events also to special level editor variable */
   custom_element = element_info[element];
+  custom_element_change = *element_info[element].change;
 }
 
 void DrawLevelEd()
@@ -4471,7 +4769,7 @@ static void ModifyEditorCounter(int counter_id, int new_value)
   ModifyGadget(gi, GDI_NUMBER_VALUE, new_value, GDI_END);
 
   if (counter_value != NULL)
-    *counter_value = gi->text.number_value;
+    *counter_value = gi->textinput.number_value;
 }
 
 static void ModifyEditorCounterLimits(int counter_id, int min, int max)
@@ -4486,7 +4784,7 @@ static void ModifyEditorSelectbox(int selectbox_id, int new_value)
 {
   int gadget_id = selectbox_info[selectbox_id].gadget_id;
   struct GadgetInfo *gi = level_editor_gadget[gadget_id];
-  int new_index_value = SetSelectboxValue(selectbox_id, new_value);
+  int new_index_value = setSelectboxValue(selectbox_id, new_value);
 
   ModifyGadget(gi, GDI_SELECTBOX_INDEX, new_index_value, GDI_END);
 }
@@ -4662,6 +4960,19 @@ static void DrawElementContentAreas()
   DrawText(x, y + 2 * MINI_TILEY, "smashed", FONT_TEXT_1);
 }
 
+static void DrawEnvelopeTextArea()
+{
+  int id = ED_TEXTAREA_ID_ENVELOPE_INFO;
+  struct GadgetInfo *gi = level_editor_gadget[textarea_info[id].gadget_id];
+
+  UnmapGadget(gi);
+  DrawBackground(gi->x, gi->y, gi->width, gi->height);
+
+  ModifyGadget(gi, GDI_AREA_SIZE, level.envelope_xsize, level.envelope_ysize,
+              GDI_END);
+  MapTextAreaGadget(ED_TEXTAREA_ID_ENVELOPE_INFO);
+}
+
 char *getElementDescriptionFilename(int element)
 {
   char *docs_dir = options.docs_directory;
@@ -5069,7 +5380,8 @@ static boolean checkPropertiesConfig()
 
   if (IS_GEM(properties_element) ||
       IS_CUSTOM_ELEMENT(properties_element) ||
-      HAS_CONTENT(properties_element))
+      HAS_CONTENT(properties_element) ||
+      properties_element == EL_ENVELOPE)
     return TRUE;
   else
     for (i=0; elements_with_counter[i].element != -1; i++)
@@ -5121,6 +5433,15 @@ static void DrawPropertiesConfig()
   if (IS_GEM(properties_element))
     MapCheckbuttonGadget(ED_CHECKBUTTON_ID_EM_SLIPPERY_GEMS);
 
+  if (properties_element == EL_ENVELOPE)
+  {
+    /* display counter to choose size of envelope text area */
+    MapCounterButtons(ED_COUNTER_ID_ENVELOPE_XSIZE);
+    MapCounterButtons(ED_COUNTER_ID_ENVELOPE_YSIZE);
+
+    DrawEnvelopeTextArea();
+  }
+
   if (IS_CUSTOM_ELEMENT(properties_element))
   {
     /* draw stickybutton gadget */
@@ -5183,7 +5504,13 @@ static void DrawPropertiesAdvanced()
     MapSelectboxGadget(i);
 
   /* draw textbutton gadgets */
-  MapTextbuttonGadget(ED_TEXTBUTTON_ID_SAVE_AS_TEMPLATE);
+  for (i=ED_TEXTBUTTON_ID_CHANGE_FIRST; i<=ED_TEXTBUTTON_ID_CHANGE_LAST; i++)
+    MapTextbuttonGadget(i);
+
+  /* draw graphicbutton gadgets */
+  for (i =  ED_GRAPHICBUTTON_ID_CHANGE_FIRST;
+       i <= ED_GRAPHICBUTTON_ID_CHANGE_LAST; i++)
+    MapGraphicbuttonGadget(i);
 
   /* draw drawing area gadgets */
   DrawPropertiesAdvancedDrawingAreas();
@@ -6039,19 +6366,19 @@ static void HandleDrawingAreas(struct GadgetInfo *gi)
        }
        else if (id == GADGET_ID_CUSTOM_CHANGE_TARGET)
        {
-         custom_element.change.target_element = new_element;
+         custom_element_change.target_element = new_element;
 
          CopyCustomElementPropertiesToGame(properties_element);
        }
        else if (id == GADGET_ID_CUSTOM_CHANGE_CONTENT)
        {
-         custom_element.change.content[sx][sy] = new_element;
+         custom_element_change.content[sx][sy] = new_element;
 
          CopyCustomElementPropertiesToGame(properties_element);
        }
        else if (id == GADGET_ID_CUSTOM_CHANGE_TRIGGER)
        {
-         custom_element.change.trigger_element = new_element;
+         custom_element_change.trigger_element = new_element;
 
          CopyCustomElementPropertiesToGame(properties_element);
        }
@@ -6166,11 +6493,11 @@ static void HandleDrawingAreas(struct GadgetInfo *gi)
       else if (id == GADGET_ID_CUSTOM_CONTENT)
        PickDrawingElement(button, custom_element.content[sx][sy]);
       else if (id == GADGET_ID_CUSTOM_CHANGE_TARGET)
-       PickDrawingElement(button, custom_element.change.target_element);
+       PickDrawingElement(button, custom_element_change.target_element);
       else if (id == GADGET_ID_CUSTOM_CHANGE_CONTENT)
-       PickDrawingElement(button, custom_element.change.content[sx][sy]);
+       PickDrawingElement(button, custom_element_change.content[sx][sy]);
       else if (id == GADGET_ID_CUSTOM_CHANGE_TRIGGER)
-       PickDrawingElement(button, custom_element.change.trigger_element);
+       PickDrawingElement(button, custom_element_change.trigger_element);
       else if (id == GADGET_ID_RANDOM_BACKGROUND)
        PickDrawingElement(button, random_placement_background_element);
       else if (id >= GADGET_ID_ELEMENT_CONTENT_0 &&
@@ -6216,7 +6543,7 @@ static void HandleCounterButtons(struct GadgetInfo *gi)
   }
 
   if (gadget_id == counterbutton_info[counter_id].gadget_id_text)
-    *counter_value = gi->text.number_value;
+    *counter_value = gi->textinput.number_value;
   else
     ModifyEditorCounter(counter_id, *counter_value + step);
 
@@ -6226,6 +6553,11 @@ static void HandleCounterButtons(struct GadgetInfo *gi)
       DrawElementContentAreas();
       break;
 
+    case ED_COUNTER_ID_ENVELOPE_XSIZE:
+    case ED_COUNTER_ID_ENVELOPE_YSIZE:
+      DrawEnvelopeTextArea();
+      break;
+
     case ED_COUNTER_ID_LEVEL_XSIZE:
     case ED_COUNTER_ID_LEVEL_YSIZE:
       lev_fieldx = level.fieldx;
@@ -6254,7 +6586,7 @@ static void HandleTextInputGadgets(struct GadgetInfo *gi)
 {
   int type_id = gi->custom_type_id;
 
-  strcpy(textinput_info[type_id].value, gi->text.value);
+  strcpy(textinput_info[type_id].value, gi->textinput.value);
 
   if (type_id == ED_TEXTINPUT_ID_ELEMENT_NAME)
   {
@@ -6264,6 +6596,13 @@ static void HandleTextInputGadgets(struct GadgetInfo *gi)
   }
 }
 
+static void HandleTextAreaGadgets(struct GadgetInfo *gi)
+{
+  int type_id = gi->custom_type_id;
+
+  strcpy(textarea_info[type_id].value, gi->textarea.value);
+}
+
 static void HandleSelectboxGadgets(struct GadgetInfo *gi)
 {
   int type_id = gi->custom_type_id;
@@ -6271,19 +6610,26 @@ static void HandleSelectboxGadgets(struct GadgetInfo *gi)
   *selectbox_info[type_id].value =
     selectbox_info[type_id].options[gi->selectbox.index].value;
 
-  if ((type_id >= ED_SELECTBOX_ID_CUSTOM_FIRST &&
-       type_id <= ED_SELECTBOX_ID_CUSTOM_LAST) ||
-      (type_id >= ED_SELECTBOX_ID_CHANGE_FIRST &&
-       type_id <= ED_SELECTBOX_ID_CHANGE_LAST))
+  if (type_id == ED_SELECTBOX_ID_SELECT_CHANGE_PAGE)
+  {
+    element_info[properties_element].current_change_page = gi->selectbox.index;
+
+    DrawPropertiesWindow();
+  }
+  else if ((type_id >= ED_SELECTBOX_ID_CUSTOM_FIRST &&
+           type_id <= ED_SELECTBOX_ID_CUSTOM_LAST) ||
+          (type_id >= ED_SELECTBOX_ID_CHANGE_FIRST &&
+           type_id <= ED_SELECTBOX_ID_CHANGE_LAST))
     CopyCustomElementPropertiesToGame(properties_element);
 }
 
 static void HandleTextbuttonGadgets(struct GadgetInfo *gi)
 {
   int type_id = gi->custom_type_id;
+  int i;
 
-  if (type_id >= ED_TEXTBUTTON_ID_PROPERTIES_INFO &&
-      type_id <= ED_TEXTBUTTON_ID_PROPERTIES_ADVANCED)
+  if (type_id >= ED_TEXTBUTTON_ID_PROPERTIES_FIRST &&
+      type_id <= ED_TEXTBUTTON_ID_PROPERTIES_LAST)
   {
     edit_mode_properties = gi->custom_type_id;
 
@@ -6300,6 +6646,55 @@ static void HandleTextbuttonGadgets(struct GadgetInfo *gi)
     if (new_template)
       Request("Tem- plate saved !", REQ_CONFIRM);
   }
+  else if (type_id == ED_TEXTBUTTON_ID_ADD_CHANGE_PAGE &&
+          custom_element.num_change_pages < MAX_CHANGE_PAGES)
+  {
+    struct ElementInfo *ei = &element_info[properties_element];
+
+    setElementChangePages(ei, ei->num_change_pages + 1);
+
+    /* set new change page to be new current change page */
+    ei->current_change_page = ei->num_change_pages - 1;
+    ei->change = &ei->change_page[ei->current_change_page];
+
+    setElementChangeInfoToDefaults(ei->change);
+
+    DrawPropertiesWindow();
+  }
+  else if (type_id == ED_TEXTBUTTON_ID_DEL_CHANGE_PAGE &&
+          custom_element.num_change_pages > MIN_CHANGE_PAGES)
+  {
+    struct ElementInfo *ei = &element_info[properties_element];
+
+    /* copy all change pages after change page to be deleted */
+    for (i = ei->current_change_page; i < ei->num_change_pages - 1; i++)
+      ei->change_page[i] = ei->change_page[i + 1];
+
+    setElementChangePages(ei, ei->num_change_pages - 1);
+
+    DrawPropertiesWindow();
+  }
+}
+
+static void HandleGraphicbuttonGadgets(struct GadgetInfo *gi)
+{
+  int type_id = gi->custom_type_id;
+
+  if (type_id == ED_GRAPHICBUTTON_ID_PREV_CHANGE_PAGE)
+  {
+    if (element_info[properties_element].current_change_page > 0)
+      element_info[properties_element].current_change_page--;
+
+    DrawPropertiesWindow();
+  }
+  else if (type_id == ED_GRAPHICBUTTON_ID_NEXT_CHANGE_PAGE)
+  {
+    if (element_info[properties_element].current_change_page <
+       element_info[properties_element].num_change_pages - 1)
+      element_info[properties_element].current_change_page++;
+
+    DrawPropertiesWindow();
+  }
 }
 
 static void HandleRadiobuttons(struct GadgetInfo *gi)
@@ -6956,13 +7351,13 @@ static void HandleDrawingAreaInfo(struct GadgetInfo *gi)
                getElementInfoText(custom_element.content[sx][sy]));
     else if (id == GADGET_ID_CUSTOM_CHANGE_TARGET)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2, "%s",
-               getElementInfoText(custom_element.change.target_element));
+               getElementInfoText(custom_element_change.target_element));
     else if (id == GADGET_ID_CUSTOM_CHANGE_CONTENT)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2, "%s",
-               getElementInfoText(custom_element.change.content[sx][sy]));
+               getElementInfoText(custom_element_change.content[sx][sy]));
     else if (id == GADGET_ID_CUSTOM_CHANGE_TRIGGER)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2, "%s",
-               getElementInfoText(custom_element.change.trigger_element));
+               getElementInfoText(custom_element_change.trigger_element));
     else if (id == GADGET_ID_RANDOM_BACKGROUND)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2, "%s",
                getElementInfoText(random_placement_background_element));