The procedure is the same for programming and changing.
Press [Facsimile Features].
Press [Scan Settings].
Press [Program / Change / Delete Scan Size].
Make sure that [Program / Change] is selected.
Select [Program Size 1] or [Program Size 2].
Enter a horizontal size using the number keys, and then press [].
Each time you press [mm] or [inch], the units switch between "mm" and "inch".
If you enter a length and press [mm] or [inch], the length is converted automatically according to the unit (fractions are rounded off). For example, when you enter [2], [2], and [0] in millimeters and change to "inch", the length 8.7 "inch" is shown on the display. If you press [mm] again, "221 mm" is displayed.
Select a vertical size.
The displayed vertical size differs depending on the selected unit.
Press [OK].
Press [Exit] twice.