This major menu allows you to control the parameters affecting the display of density maps. Data extracted from the maps are defined as objects. Each object requires the user to define a number of parameters. Thus it is possible to have different maps, colour, contour level etc. displayed at the same time. Any number of objects can be made from a particular map file but a particular object comes from just one file, one level, one volume, one colour.
The program caches the map to speed up access. This is associated with the file name so the user must issue a Map_cache command before introducing a different map with the same file name during the same session.
Map objects are deleted with the Delete_object command (see section 3.2.8).