Epson ELP-3000 Owner's Manual page 51

Use the Synchronize setting only if the image cannot be
corrected by adjusting Brightness and Contrast.
Tracking Matches the projector's internal clock to the various
computer graphics signals. If vertical lines appear within
an image, adjust Tracking to spread the distance between
the lines until they disappear
Red Adjusts the strength of the red level.
Green Adjusts the strength of the green level.
Blue
Adjusts the strength of the blue level.
Text Compresses the projected image to fit into the projector's
640-pixel image area. Normally you need to compress
(PC only)
an image only if your DOS software program has a text
screen wider than the projector's area.
Mac LC
Configures the projector for the Macintosh LC model.
Turn on this setting if you have a Macintosh LC.
(Mac only)
Menu Settings 35