Keystone; H Keystone - Optoma HD70 Manual

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Detail informations about LBX mode :
1. Some Letter-Box DVD contents are not enhanced for 16x9
TV, then image will not look right in 16:9 display.One can
use 4:3 mode to view the correct info. But if the content
itself is not 4:3, it will have black bars around the image
in a 16:9 display. For this kind of content, you can use LBX
mode to fill the image in the 16x9 display as much as pos-
sible.
2. If you use an external 16x9 lens, this LBX mode also allows
you to watch a 2.35:1 content (include Anamorphic DVD
and HDTV film source) that support anamorphic wide is
enhanced for 16x9 Display in a wide 2.35:1 image.
In this case, there are no black bars, the full lamp power
and vertical resolution is fully utilized for maximum view-
ing effects.
Other than these two occasions, one should stay with 16:9
and 4:3 modes for most viewing experiences.
Overscan
Overscan function removes the noise in a video image. Over-
scan the image to remove video encoding noise on the edge
of video source.
Edge Mask
Press the to reduce the size of an image.

 Press the to magnify an image on the projection screen.
H Image Shift
Shifts the projected image position horizontally.
V Image Shift
Shifts the projected image position vertically.

H Keystone

Press the or to adjust image distortion horizontally and
makes a squarer image.
V Keystone
Press the or to adjust image distortion vertically and
makes a squarer image.
User Controls