How much paper can I load in the rear paper feeder of the Epson ET-2800?

For plain paper and Epson bright white papers 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 like Oficio 9 or 8.5 x 13 inches, load only 1 sheet at a time. Up to 10 envelopes can be loaded at once. (Page 54)