-after, it may even be the same).
-
-All this definition block members must be present within a block, but only
-"ACTION" / "OBJECT" must be positioned at the respective blocks' first line,
-the others may appear in whatever order and even multiple times. If a block is
-finished, however, it cannot be re-defined by starting a new block wit the same
-object type or action id. Tokens in this config file are separated by
-whitespace. Single quotes can be put around string values that are to include
-whitespace by themslves.
+after, it may even be the same). "START_NUMBER" sets the number of objects that
+are to appear of the given type on the map on game start.
+
+The map is defined by a single-line block. Its number value sets the map
+square's edge length. It must be >= 1 and <= 256:
+
+MAP_LENGTH 64
+
+The player type / species is also defined by a single line block. Its number
+value sets the player's creature's map object type by its id:
+
+PLAYER_TYPE 0
+
+All these definition block members must be present within their respective
+blocks, but only "ACTION" and "OBJECT" must be positioned at their respective
+blocks' first line; the others may appear in whatever order and even multiple
+times. If an object or action definition block is finished, however, it cannot
+be re-defined by starting a new block with the same object type or action id.
+
+Tokens in this config file are separated by whitespace. Single quotes can be
+put around string values that are to include whitespace by themslves. Note that
+all numbers must be decimal representations of unsigned 8 bit integers, i.e.
+>= 0 and < 256 and sans preceding "+".