Dell 5535 Mono Laser User Manual page 73

Without an optional StapleSmart II Finisher
Single-sided printing
Duplex (two-sided) printing
Note: Notice the maximum fill line on the side of the tray which indicates the maximum height for loading paper.
Do not overload the tray.
6
If necessary, adjust the paper guides to lightly touch the sides of the stack, and lock the length guide for the paper
sizes indicated on the tray.
With an optional StapleSmart II Finisher
Single-sided printing
Duplex (two-sided) printing
Loading paper and specialty media
73