Brother HL-3400CN Series User Manual page 45

2. Adjust the Paper Guides to accommodate the paper size you
wish to use. Hold the shaded parts shown below and gently
slide the guides into place.
Fig. 2-22 Adjust the Paper Guides
3. Load paper into the Media Cassette and refit the paper cassette
cover.
CHAPTER 2 SETTING UP THE PRINTER
2–15