HP 3070 B611 - Manual (Page 21)

c. Load paper.
Insert stack of paper into paper tray with short edge forward and print side down.
Slide stack of paper until it stops.
Adjust paper-width guides so they fit against both sides of the stack of paper.
Load small-size paper
a. Slide the paper tray out.
Slide the paper tray and pull out the tray extender.
b. Slide paper-width guides outward.
Slide paper-width guides outward.
Load media 19
Paper basics