Canon LBP7018C E-Manual page 148

paper guides.
6
Install the tray cover.
For details on the basic printing procedure, see
If printing custom size paper, you need to register the custom paper size in the printer driver previously.
"Registering a Custom Paper Size"
In cases such as where paper runs out during printing, the
resumes by pressing the [
"Basic Printing
] (Paper) key.
Procedure."
(Paper) indicator (orange) blinks. Printing