2013

If a group contains sub-groups, you are prompted to Accept to ungroup the
current selection or choose Next to cycle through the groups in the selection
set.
See also:
Edit Groups
UNION
Combines selected 3D solids, surfaces, or 2D regions by addition.
Access Methods
Button
Ribbon:
Toolbar: Modeling tool set  Solids - Edit tool group  Booleans flyout
 Union
Summary
You can combine two or more 3D solids, surfaces, or 2D regions into a single,
composite 3D solid, surface, or region. You must select the same type of objects
to combine.
1128 | Chapter 2 Commands