Move Levels & Object List

Move Up One Level
 
Moves from a lower to a higher level of decomposition. See 2.6 Levels of decomposition for details.
 
Move Down One Level
 
Moves from a higher to a lower level of decomposition. See 2.6 Levels of decomposition for more details.
 
Object List

When the edit option  is invoked the following window is popped-up:
 
This activates the three edit options:
 
"Divide Space"
"Separate Composite Space"
"Edit Vertices"
 
If this window closes whilst you are still in the edit mode you can click on the icon on the generic tool bar and open it again.