When expanding or contracting the scanned image, you can adjust the expansion ratio by using the Adjustments feature in Epson Scan 2 Utility. This feature is only available for Windows.
Epson Scan 2 Utility is one of the applications supplied with the scanner software.
Start Epson Scan 2 Utility.
Select the Adjustments tab.
Use Expansion/Contraction to adjust the expansion ratio for scanned images.
Click Set to apply the settings to the scanner.