Canon LBP-1210 Printer User Manual


 
20 Paper Handling Chapter 2
2. Adjust the paper guides on the right, left, and front to the size of the
envelope.
Most applications allow you to choose which way envelopes feed into the
printer. Make sure your printer settings before you print.
When using C5-size envelopes, remove any stiffness by lightly flexing
both edges of the envelope.