IBM VT670 - Manual (Page 33)

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ᕤ Correcting Keystone Distortion
Auto Keystone Correction
The Auto Keystone correction feature will correct the vertical distortion of a projected image on the screen. No special
operation required. Just put the projector on a flat surface.
Note that the vertical keystone angle can be corrected between 30 degrees upward and 30 degrees downward of
projector tilt from level.
3. Projecting an Image (Basic Operation)
NOTE: Auto and Manual Keystone correction angle could be less than 30 degrees depending on some kinds of signal and aspect
ratios.
NOTE: The Auto Keystone Correction feature can cause an image to be slightly blurred because the correction is made electroni-
cally.
Manual Keystone Correction
You can also correct the vertical keystone distor-
tion manually.
To do so:
1. Press the MENU button.
The menu will be displayed.
2. Turn off the Auto Keystone function.
Use the SELECT
̄
button to select
“Image” and then press the SELECT
̈
button. The “Auto Keystone” will be
displayed. Press the SELECT
̈
to select
“Off”.
3. Select the Keystone function.
Use the SELECT ̄ button to select
“Keystone”.
4. Correct the vertical distortion.
Use the SELECT
̇
or
̈
button to correct
the vertical keystone distortion.
NOTE: The Keystone Correction feature can cause
an image to be slightly blurred because the
correction is made electronically.