Destination Button - Epson Expression 1680 Reference Manual

If you are using an EPSON Stylus printer and are printing scanned
images with the Economy, Normal, or Fine Print Quality settings
in your printer software, selecting EPSON Stylus Printer (Fine) is
recommended. If you are printing with the SuperFine or Photo
Print Quality settings, select EPSON Stylus Printer (Photo).
Note:
The effects of the Destination settings cannot be viewed in the Preview
window.

Destination button

The Destination button opens the Destination dialog box, where
you can change Resolution and Unsharp Mask settings and add
your custom settings to the Destination list, as described below.
To save the settings you made, type a new name in the Destination
Name box, and then click Save. To delete a custom Destination
setting, select the setting name then click Delete.
To apply your settings, click OK. To cancel the settings, click
Cancel.
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Understanding EPSON TWAIN Pro Features