HP Color LaserJet Enterprise M750 Printer series - Manual (Page 30)

4. Make sure the stack fits under the tabs on the
guides and does not exceed the load-level
indicators.
5. Adjust the side guides so that they lightly
touch the paper stack but do not bend it.
Load Tray 2, Tray 3, and optional Trays 4, 5, and 6 with standard-size paper
1. Open the tray.
NOTE: Do not open the tray while it is in
use.
20 Chapter 3 Paper and print media ENWW