When scanning photographs or other images for use in a word processor or other graphics application, you should try different settings for the contrast, mode and resolution to see which settings best suit your needs.
Custom:If you selected Custom as the size, type the Width and Length.
Or, you can check the Business Card Size box to adjust the scanning area to business card or a custom size automatically.
17 - 5 H O W T O S C A N U S I N G W I N D O W S ®