HP Deskjet 5850 Color Inkjet Printer - Manual (Page 108)

1. out tray extension
When printing in FastDraft mode, pull out the Out tray extension, expand the Out
tray extension, then unfold the Out tray extension stop.
1. out tray extension 2. out tray extension stop
Do not unfold the Out tray extension stop when printing on legal
paper. Only unfold the Out tray extension stop when printing in
FastDraft mode on other types of media.
Folding the paper tray
Follow these steps to fold the paper tray:
1. Fold the Out tray extension stop, collapse the Out tray extension, then push
the Out tray extension into its storage slot.