change_save_set/[2,3]

     change_save_set(+Displayable, +Window, +SaveSetMode)
     change_save_set(+Window, +SaveSetMode)
     

Adds or deletes the given Window from the given Displayable's save set. If Displayable is omitted, the default Display is used.

SaveSetMode specifies the action:

insert

If Window should be added to the Display's save set.

delete

If Window should be deleted from the Display's save set.

Window must have been created by another client.