Toshiba TLP-B2ultraS Owner's Manual page 29

Correcting the keystone distortion
A picture may be expanded on the upper side if projected upward from the
projector lifted up by the foot adjuster. The projector can correct this keystone
distortion automatically.
Press KEYSTONE.
KEY
STONE
The keystone distortion on the picture projected is
automatically corrected and the fine adjustment screen of
the keystone distortion correction appears.
You may perform the fine adjustment by pressing
buttons.
After a few seconds, the fine adjustment screen
disappears.
To correct further, make the "Keystone" adjustment on the
menu. 38
(–): To reduce the lower width.
(+): To reduce the upper width.
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