Epson Expression 1680 - Manual (Page 37)

Understanding EPSON TWAIN Pro Features 2-17
Making Configuration Settings
Click the Configuration button to open the Configuration dialog
box, where you can make a variety of configuration settings
related to the Preview window and the previewed image, color
adjustment, and the Densitometer.
Preview menu
This menu allows you to make basic settings that affect the
properties of the Preview window.
Preview Window Size
Select the size of the Preview window. Your choices are Large ,
Medium , and Small .