HP Deskjet 6988dt Printer - Manual (Page 13)

1 In tray
Slide the paper guides firmly against the edges of the media on which you are printing.
1 Paper-width guide
2 Paper-length guide
Out tray
Printed pages are deposited in the Out tray.
1 Out tray
2 Photo/envelope feeder
Use the photo/envelope feeder to print single envelopes, small photos, and cards.
Raise the Out tray to load paper or other media. Lower the Out tray before printing.
User's guide 11