Epson ES-300C User Manual page 39

Note
Make sure you select Add and not
TWAIN modifies the existing target device rather than creating a
new one.
6. Select OK to return to the Epson TWAIN Scanner Control
screen.
To scan an image at the resolution you have just identified,
follow the procedures in the section "Basic Scanning with
Epson TWAIN." Instead of selecting VGA Screen as your
target device, however, make sure you select the target device
you created, for example, "VGA with 200 DPI."
Modify
or OK or Epson
Using TWAIN 3-9