ViewSonic PF790 User Manual page 9

Main Menu Controls
The menu items shown below can be adjusted by using the up
buttons.
Control
8 ViewSonic PF790
Explanation
adjusts the difference between the image
Contrast
background (black level) and the foreground (white level).
adjusts background black level of the screen
Brightness
image.
Horizontal Position
adjusts width of the screen image.
Horizontal Size
Vertical Position
adjusts the height of the screen image.
Vertical Size
curves the vertical sides of the screen image.
Pincushion
curves the vertical edges of the screen to the
Pin Balance
left or right.
makes the vertical edges of the screen image
Trapezoid
parallel.
slants the vertical edges of the screen image.
Parallel
expands and contracts the entire screen image.
Zoom
Tilt rotates the entire screen image.
moves screen image left or right.
moves the screen image up or down.
a nd down