Default value
The z coordinate of the object on the map.
The z coordinate is how objects move between maps. When you include several maps in a project, they are placed on different z levels so that the full map is a single 3-dimensional space. It is also possible for a single map file to contain multiple z levels.
Do not confuse this with drawing layer. The z coordinate moves an object between different maps. The layer variable determines the order in which an object is drawn graphically relative to other objects at the same position on the map.
You may assign the coordinates of movable objects (mobs and objs), but this is not advisable. It is better to compute the new location (with locate()) and move them to that. Then you can use the normal Move() procedure, which enables all the normal movement behavior.
For areas that are on the map, this is the coordinate of the turf with the lowest z, y, and x coordinate (in that order) that is contained by the area.