BOXLIGHT MP63e - Manual (Page 40)

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3. SETTING
h position -128/+127 move the image position horizontally
v position -128/+127 move the image position vertically
phase -128/+127 sets the synchornization polarity
frequency 1294/1394 sets the horizon
tal scanning frequency
keystone V
-128/+127 corrects vertical keystone distortion in
image
keystone H -128/+127
corrects horizontal keystone distortion in
image
auto sync execute sets all of the above settings automatically