-TT_ID [-32768 to 32767]
-Select thing type to manipulate by argument as ID. If argument is <0 or <255,
-change it to the lowest unused thing type ID. If thing type of ID does not exist
-yet, create it with default name "(none)", corpse ID equal to the new thing
-type's ID, and remaining thing type attributes to 0.
+T_MEMMAP [0 to 255] [string]
+Set part of selected thing's memory of the game map to string argument: the line
+of the argument's number.
+
+T_MEMDEPTHMAP [0 to 255] [string]
+Set part of selected thing's game map memory depth map to string argument: the
+line of the argument's number.
+
+T_MEMTHING [0 to 255] [0 to 255] [0 to 255]
+Add to selected thing's memory of things on map thing of ID of first argument,
+y position of second argument and x position of third argument.
+
+TT_ID [-1 to infinity]
+Select thing type to manipulate by argument as ID. If argument is < 0, change it
+to the lowest unused thing type ID. If thing type of ID does not exist yet,
+create it with default name "(none)", corpse ID equal to the new thing type's
+ID, symbol "?", and remaining thing type attributes to 0.