Dell P2213 Monitor - Manual (Page 39)

NOTE: Aspect Ratio is not available in P1913S.
Aspect Ratio Adjust the image ratio to Wide 16:10, 5:4 or 4:3.
NOTE: Aspect Ratio is not available in P1913S.
Horizontal Position
Use or to adjust the image left or right. Minimum is '0' (-). Maximum is '100' (+).
Vertical Position
Use or to adjust the image up or down. Minimum is '0' (-). Maximum is '100' (+).
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 or to adjust the sharpness from '0' to '100'.
Pixel Clock The Phase and Pixel Clock adjustments allow you to adjust your monitor to your preference.
Use or to adjust for best image quality.
Phase If satisfactory results are not obtained using the Phase adjustment, use the Pixel Clock (coarse) adjustment and then use Phase (fine), again.