How much paper can I load in the rear paper feeder?

For plain paper in Letter or A4 size or smaller, you can load up to the line indicated by the arrow mark, with a manual double-sided capacity of 30 sheets. For larger sizes such as Oficio 9 or 8.5 x 13 inches, only 1 sheet can be loaded at a time. Photo paper such as Epson Premium Photo Paper Glossy supports up to 20 sheets, and envelopes can be loaded up to 10 at a time. (Page 54-55)