HP Photosmart C4680 All-in-One Printer - Manual (Page 14)

Load full-size paper
a. Lower paper tray.
Slide paper-width guide outwards.
b. Load paper.
Insert stack of paper into paper tray with short edge forward and print side
down.
Slide stack of paper forward until it stops.
Slide paper-width guide inward until it stops at edge of paper.
Load media 11
Paper basics