Select command
Highlighting will only be active if you checked the option "Preselect in geometry view" (active by default) using the Visuallization tab via the
Tools->Option...........command.
To change pre selected element type highlighting options:
Tools->options->general->visualization->........................................
Cltr-click->to add more object to initial selection.
Cltr-clicking can be done in the geometry area,specification tree or lists in dialog boxes.To deselect ,click anywhere in the background.