Ask Proxima M1 User Manual page 14

Adjust the zoom using the tab or the focus using the dial by rotating them
until the desired image size and sharpness are produced.
adjust zoom and focus
zoom focus
adjust keystone
If the image is not square, adjust the keystone using the buttons on the key-
pad. Press the upper Keystone button to reduce the upper part of the
image, and press the lower Keystone button to reduce the lower part.
adjust volume
Adjust the volume on the keypad.
adjust Picture menu
Adjust the Contrast, Brightness, Color, or Tint in the Picture menu.
See page 27 for help with the menus.
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