HP mp3320 Series User Manual page 51

3. With the projector lens aiming away from the screen, insert the mounting plate
onto the bracket so the tabs engage, then pivot the projector so it aims forward.
Tighten the rear thumbscrew fully, then tighten the two other thumbscrews.
4. Adjust the on-screen menu to match your settings. Open the on-screen menu and
select Setup > Projector position. Then select Front Ceiling from the
drop-down list.
User's Guide
Installing Permanently
51