The Standard Part Content Libraries shipped with AutoCAD Mechanical toolset contains more than 600,000 pre-drawn standard parts and standard features.
Due to the large number of parts and features, dialog boxes displaying the content library may take time to load. You can hide the standards you do not use frequently and display them only when needed. You can also change the position of content library items, so that frequently used standards and parts appear at the beginning of the selection lists.
By default, standard parts and standard features appear on special mechanical layers called standard part layers. By default, the names of these layers end with the letter “N.” Standard part layers enable you to toggle the visibility of all standard parts with a single click. If required, You can configure AutoCAD Mechanical toolset to create standard parts on regular mechanical layers instead of standard part layers.
You can also change the representation of standard parts and standard features at any time during a drawing session.
Standard part settings are saved in the Windows registry. Once you set them, they remain in force regardless of the selected drafting standard. Since these settings are not in the drawing, they do not move from one computer to another through template (.dwt) files.