Inserting Mounting Plates
Mounting plates are inserted from the Mounting plates category in the Insertion Center.
If you need plates with measures that are not available via the Insertion Center, you can create these plates as custom mounting plates and directly insert it. Click the Create Custom ... button in the Mounting plates category in the Insertion Center and enter the plate parameters. Optionally, check the Add to library checkbox to add the mounting plate to your library (plate is available in the Insertion Center for future use).