Optoma Optoma EP750 - Manual (Page 18)

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Frequency
“Frequency” is for changing the display data frequency to match the frequency
of your computer’s graphic card. When you experience a vertical flickering bar,
use this function to make an adjustment.
Tracking
Choose “Tracking” item to synchronize the signal timing of the display with
that of the graphic card. When you experience an unstable or flickering image,
use this function to correct it.
16 : 9 / 4 : 3
You can use this function to fit your desired aspect ratio type.
Horizontal Position
4 Press the to move the image left.
4 Press the to move the image right.
Vertical Position
4 Press the to move the image up.
4 Press the to move the image down.
Reset
Choose “Yes” to return the display parameters back to its factory default.
Image-II (Computer mode)
User Controls
Audio Image-I Image-II
Language Management
Frequency
Tracking
16:9 / 4:3
H. Position
V. Position
Reset
Yes No
Computer mode
v Reset : Reset items include both
Image-I and Image-II settings.