Using Layers to Organize Your Drawing - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 263

to the A-DECK-STRS layer. You'll select the threshold and steps by using a selec-
tion window.
FiGuRE 6.17 Selecting the front deck (top), deselecting the front stairs (middle), and
the completed selection (bottom)