AutoCAD Mechanical provides content libraries with hundreds of thousands of pre-drawn standard parts. Libraries are available for each of eighteen countries, containing parts that correspond to the standards of those countries. During installation of AutoCAD Mechanical, you choose whether to install one or more of these libraries or instead use your own existing shared libraries. If you choose to install content libraries, you select the libraries for those country standards you need.
If later, after installation, you want to add or remove content libraries, you do this by launching the Installer in maintenance mode and choosing Add or Remove Features to select the standard content libraries you require. To launch the Installer in maintenance mode, navigate from Windows Start to the control panel for adding, changing, and removing programs. When you select AutoCAD Mechanical as the program to change, the Installer will open in maintenance mode.