HP LaserJet Pro 300 Color MFP M375 - Manual (Page 97)

3. If you are loading long sheets of paper, flip
out the extension.
4. Extend the paper guides fully (callout 1) and
then load the paper stack into Tray 1 (callout
2). Adjust the paper guides to the size of the
paper.
NOTE: Place the paper into Tray 1 with the
side to be printed on face-up and the top
toward the product.
Load Tray 2 or optional Tray 3
1. Pull the tray out of the product.
ENWW Load paper trays 81