Dell Projector 4100MP - Manual (Page 49)

Select Yes to reset the projector to its factory default settings. Reset items include both computer image and video image
settings.
Computer Image Menu
Computer Image- Note: this menu is only available when a computer input signal is present.
Frequency
Change the display data clock frequency to match the frequency of your computer graphics card. If you see vertical
flickering bars, use the frequency control to minimize the bars. This is a coarse adjustment.
Tracking
Synchronize the phase of the signal of the display with that of the graphic card. If you experience an unstable or flickering
image, use the Tracking function to correct it. This is a fine adjustment.
NOTE: Adjust the Frequency first and then the Tracking.
Hor. Position (Horizontal Position)
l Press to move the image to the left.
l Press to move the image to the right.
Ver. Position (Vertical Position)
l Press to move the image down.
l Press to move the image up.