Dell S520 User Manual page 45

NOTE:
To capture a full image, ensure that the input signal
connected to the projector is at 1280 x 800 resolution.
T P —Test Pattern is used to test focus and resolution.
EST ATTERN
You can enable or disable the Test Pattern by selecting Off, 1, or 2.
Test Pattern 1:
Test Pattern 2:
F R —Select Confirm and press
ACTORY ESET
its factory default. The below warning message appears:
Reset items include both computer sources and Video source
settings.
to reset all settings to
Using Your Projector 45