InFocus IN24 Reference Manual page 19

Problem
image not square
image not sharp
A B A B
image does not fit 4:3 or 16:9 screen
Solution
adjust Keystone on keypad
adjust Sharpness in the Picture>Advanced
menu
change aspect ratio to 4:3 or 16:9 in
Picture>Aspect ratio menu
18
Result
square image
correct image
A B
correct image