HP Officejet Pro 8500A - Manual (Page 28)

3. Insert the media print-side down along the right of the main tray. Make sure the
stack of media aligns with the right and back edges of the tray, and does not
exceed the line marking in the tray.
NOTE: Do not load paper while the printer is printing.
4. Slide the media guides in the tray to adjust them for the media size that you have
loaded.
5. Lower the output tray.
6. Pull out the tray extender.
Load envelopes
To load envelopes
Use these instructions to load an envelope
1. Lift the output tray.
2. Slide the paper width guide out as far as possible.
NOTE: If you are loading larger sized media, pull the input tray to extend it.
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