Ask Proxima C440/C450 User Manual page 24

Projector troubleshooting
Problem
Image not square
Image not sharp
A B A B
Image does not fit 16:9 screen
Solution
Adjust keystone the Picture menu
Adjust the focus on the keypad or
Sharpness in the Picture>Advanced menu
Change aspect ratio to 16:9 in
Picture>Aspect ratio menu
22
Result
Square image
Correct image
A B
Correct image