BenQ FP91E User Manual page 24

Press or key to adjust the Horizontal
Position, press "Exit" to return to previous
menu.
Press or key to adjust the Vertical
Position, press "Exit" key to return to previous
menu.
Press or key to adjust the value of the
Pixel Clock, press "Exit" to return to previous
menu.
Press or key to adjust the degree of Phase,
press "Exit" to return to previous menu.
24 How to adjust your Monitor