To calibrate in AmbirScan, complete the following steps:

1. Open AmbirScan.
2. Deselect Auto Scan (Note: when deselected, circular arrows will be displayed on the button).
3. Click on Settings on the left side menu.
4. Insert your calibration sheet.
5. Select Calibration.
6. Follow the onscreen prompts to complete calibration.

If calibration does not fix your scan quality, it is recommended you clean the scanner.