From TDN

Overview

Selection Sets are very useful when trying to keep track of large interiors. Or even just groups of connected or like brushes. Selection Sets are defined in the Selection Sets Form. Inside the tabbed container there is a sets tab that contains a list of all the current selection sets. By default this tab is (of course) empty.

Creating Selection Sets

You can create a selection set by first:

1. Select a group of brushes or faces
2. Click the create button at the bottom of the Sets Tab
3. Enter a Name for the selection
4. Select the "New (or replace chosen) selection set bullet.
5. Click the "Ok" button.

Deleting Selection Sets