BenQ FP937s User Manual page 22

Geometry sub menu
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.
22 How to adjust your Monitor