To Save a Drawing File to the Library (AutoCAD Mechanical Toolset)

1. Click Insert tabBlock panel Library. Find
2. In the Library dialog box, select the folder to which you want to add the drawing file, and right-click.
3. From the shortcut menu, choose Add from File.
4. In the Add File dialog box, specify the name and path of the file you want to add to the Library, or choose Browse to locate the file.
5. Choose OK.