Calibration helper

Find the right chart size for your screen and room.

1. 1

   Position

   Have someone sit at the standard testing distance (20 feet) from the screen.

2. 2

   Adjust the size

   Change the size until the 20/20 line (highlighted) is comfortably readable.

   Smaller 100% Larger
3. 3

   Fine-tune

   The person should be able to read the 20/20 line clearly. Adjust if needed.

   Tip: from the correct distance, the 20/20 line should be challenging but readable.