By default, the printer is set to recognize letter- or A4-size paper loaded in the long-edge orientation. If you want to load letter- or A4-size paper in the short-edge orientation, make sure you enable Short-edge Printing.
Make sure the printer is off.
From the printer control panel, press and hold and
while you turn the printer on.
Release both buttons when a progress bar appears on the display.
The printer performs its power-on sequence, and then the Configuration menu appears.
Press the up or down arrow until Short-edge Printing appears, and then press the arrow to the right of Short-edge Printing.
Press the left or right arrows until you see Enable, and then press Submit.
appears.
Press Back.
Press Exit Config Menu.