Indicate how to remove an orbital (or list of orbitals, previously         
selected with Orbital->Select, when 
Global is pressed).
Scope
When the 
Scope is 
All, the orbital and all 
its contents is removed. This is the default.
When the 
Scope is 
Container, the orbital is removed but
its contents (child texts) is saved, linked to the orbital parent. 
When the 
Scope is 
Contents, the orbital is preserved 
but all its contents (child texts) is removed. 
When the removed orbital was part of the current object,
the current layer becomes the new current object.
Clicking the mouse over an orbital in the current layer, its identification
is transported to the dialog and 
Ok is automatically pressed.
To recover the previous state press 
Undo.