HP Color LaserJet CM1015CM1017 Multifunction Printer series - Manual (Page 64)

Load trays
Use special print media, such as envelopes, labels, HP LaserJet glossy paper, HP LaserJet Photo
paper, and transparencies only in tray 1 and tray 2.
NOTE Tray 3 is an accessory. It is referred to as optional tray 3 in this guide.
CAUTION Do not fan paper before loading it into trays. Avoid overloading trays.
CAUTION Do not reuse paper that has been stapled. Staples that remain in reused paper
causes damage to the MFP and requires repairs that are not covered under the warranty.
Load tray 1 (single-sheet feed tray)
1. Media guides ensure that the media is correctly fed into the MFP and that the print is not skewed
(crooked on the media). Slide the media-width guides slightly wider than the print media.
50 Chapter 6 Print ENWW