Indicate how to remove a cell (or list of cells, previously         
selected with Cell->Select, when 
Global is pressed).
Scope
When the 
Scope is 
All, the cell and all 
its contents is removed. This is the default.
When the 
Scope is 
Container, the cell is removed but
its contents (clusters, molecules, groups, planes, directions, atoms,
bonds, orbitals, texts) is saved, linked to the cell parent. Crystallographic
planes and directions directly referencing the cell are removed because they 
cannot live without the cell.
When the 
Scope is 
Contents, the cell is preserved but 
all its contents (clusters, molecules, groups, planes, directions, 
atoms, bonds, orbitals, texts) is removed. 
When the 
Scope is 
cluster, 
molecule, 
group, 
plane, 
direction, 
atom, 
bond, 
orbital
or 
text, these objects are removed from the cell. 
When the removed cell included the current object,
the current layer becomes the new current object.
Clicking the mouse over a cell in the current layer, its identification
is transported to the dialog and 
Ok is automatically pressed.
To recover the previous state press 
Undo.