Saves selected items as an assembly. This command is available only when items are selected in the drawing. Assemblies are saved with the .pid file extension. A red target appears at the end of your pointer. You use this target to specify the origin of the assembly for placement. You can only use a standalone symbol as the origin of an assembly. For example, you cannot use labels, pipe runs, signal runs, or child items; however, you can use unattached ends of pipe runs. The Save Assembly dialog opens after you specify the origin, and you can name the assembly and place it in the proper directory.
The Save As Assembly command does not constitute an undoable action; therefore, it does not appear as a step available for the Undo command.