The size of originals can be specified by the following three methods:
Using the paper tray settings
When [Use Paper Tray Settings] is selected, the machine scans the originals based on the size and orientation of the paper loaded in the selected tray. You do not have to specify the size and orientation of the original.
Selecting regular sizes
You can select the size of the originals from the regular sizes.
Specifying custom sizes
You can specify both the horizontal and vertical size of the originals.