Dell P2412H User Manual page 33

Display Settings Use the Display Settings to adjust image.
Aspect Ratio Adjust the image ratio to Wide 16:9, 5:4 or 4:3.
Horizontal Position
Use
Vertical Position
Use
NOTE: Horizontal Position and Vertical Position adjustments are only available for "VGA" input.
Sharpness
This feature can make the image look sharper or softer. Use
Pixel Clock The Phase and Pixel Clock adjustments allow you to adjust your monitor to your preference.
Use
or to adjust the image left or right. Minimum is '0' (-). Maximum is '100' (+).
or to adjust the image up or down. Minimum is '0' (-). Maximum is '100' (+).
or to adjust for best image quality.
or to adjust the sharpness from '0' to '100'.