Step 3: Click "Scan" button
in the pop-up window.
Depending on the make and model of your scanner, your
pop-up window may appear different than the one to the right, but
all TWAIN-capable scanners use a similar procedure (refer to the user
manual of your scanner for instructions on setting up and using the
pop-up windows for your model). When you're ready to go, click the
"Scan" button, and your scanner will scan a preview of your