BOXLIGHT CD-850m - Manual (Page 29)

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Picture menu
To adjust the following five settings, highlight the setting, press Select, use
the up and down arrows to adjust the values, then press select to confirm
the changes.
Keystone : adjusts the image vertically and makes a squarer image. You can
also adjust keystone from the keypad.
Contrast : controls the degree of difference between the lightest and darkest
parts of the picture and changes the amount of black and white in the
image.
Brightness : changes the intensity of the image.
Color : (video sources only) adjusts a video image from black and white to
fully saturated color.
Tint : (NTSC video sources only) adjusts the red-green color balance in the
image.
Aspect Ratio : Aspect ratio is the ratio of the image width to image height.
TV screens are usually 1.33:1, also known as 4:3. HDTV and most DVDs are
1.78:1, or 16:9. The default is 4:3, which displays the input resized up or
down to fill the display area.
increasing keystone
decreasing keystone
Aspect ratio