2012

You cannot use UNION with mesh objects. However, if you select a mesh
object, you will be prompted to convert it to a 3D solid or surface.
List of Prompts
The following prompt is displayed.
Select objects Select the 3D solids, surfaces, or regions to be combined.
See also:
Create Composite Objects
UNISOLATEOBJECTS
Displays previously hidden objects.
Access Methods
Menu: Tools  Isolate  End Object Isolation
Shortcut menu: Right-click in the drawing area and click Isolate  End
Object Isolation.
Summary
Displays objects previously hidden with the ISOLATEOBJECTS (page 532) or
HIDEOBJECTS (page 507) command.
See also:
Control the Display of Objects
1094 | Chapter 2 Commands