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3M Multimedia Projector MP8640 © 3M 1997
4.2 How To Use Foot Adjusters
Adjust the projection position using the foot adjusters at the bottom of the projector.
Foot adjusters
unlock ←→ lock

Front view

Side view

4.2.1 Lift up the projector, unlock the foot adjusters.
4.2.2 Adjust a viewing angle, and then lock the foot adjusters.
4.2.3 For fine adjustments, rotate the foot adjusters.
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Caution: Do not unlock the foot adjusters if the projector is not supported.
If the foot adjusters do not lock completely, turn the foot adjusters slightly before locking.