To indicate the landscape setting, "R" is added to the end of the name of a paper size enabled for both landscape and portrait settings.
Paper that can be set either in the portrait or landscape orientation Paper that can only be set in the landscape orientation
8-1/2" x 11" A4, B5 12" x 18", 11" x 17", 8-1/2" x 14", 8-1/2" x 13", A3W, A3, B4
Paper set in the landscape orientation
Paper set in the portrait orientation
Can be placed only in the landscape orientation