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The first command On_off, updates the list of what objects are
being displayed. Since 10 menus can be associated with a major command
only 9 can be toggled on/off with Object_1. Activating
Object_2 gives another 10 objects and so on to a total of 50. Each
object being displayed is written on the menu with the hat character
preceding the name, as ^CA, for
example. Picking this item will turn on and off object CA. When
the object is turned off, the colour of the menu item will change to red, and any
alphanumeric characters in its name will be converted to lower case.