Canon LBP7780CX User Manual page 166

4
Slide the paper guides a little wider than the actual paper width.
5
Gently load paper with the printing side face-down under the load limit guides (A) until it touches the
back of the tray.
IMPORTANT
About the loading orientation of envelopes
See "Printing on Envelopes" and load envelopes in the correct orientation.
NOTE
When loading paper with a letterhead or logo
See "Paper Loading
6
Adjust the paper guides to the stack of paper so as to leave no space in between.
Orientation" and load the paper in the correct orientation.