Transparency is a great new feature in AutoCAD that is often overlooked. Sam Lucido's routine makes it easy to set transparency on a selection set — and to remove the transparency setting later, if desired. Start by loading the LISP file. Next, choose from one of four functions: T9, T7, T5, and T0. T9 sets the transparency to 90%, T7 to 70%, and T5 to 50%; T0 turns transparency off. The LISP code is simple enough to modify if your needs require a different setting. Note that the routine also controls the global transparency On/Off setting.