Scanning parameters may be adjusted both before and during scanning. You may adjust the following parameters before scanning in the scanning dialogue box. If units are set to inches, the American A, B, C , D and E sizes are available. If units are set to millimeters, the International A4, A3, A2, A1 and A0 sizes are available. If units are set to pixels, no fixed document sizes are available.
Any size is available for Portrait or Landscape .
Altering between these different units affects the document field as described below. This determines the number of Dots per Inch, which is the scanners resolution. Choose any value supported by the scanner. Note that higher resolutions than those supported by the currently configured scanner are grayed. Use this option to mirror the result of the scanning process.