Graphic Creation of Custom Library Parts and Components
If you cannot find the library part you need, you can create your own GDL object. You need not do any programming; a few techniques using familiar ARCHICAD tools lets you draw and save a customized object easily, using regular construction elements as custom building blocks (regardless of their originally intended purpose).
Custom components are sub-parts of library parts, such as doorknobs. These, too, you can create graphically and save for use with existing library parts.