HP Officejet Pro 8610 e-All-in-One Printer - Manual (Page 41)

2. Insert the envelopes print-side down and load according to the graphic.
Make sure the stack of envelopes does not exceed the lower line marking in the tray. For more
help, refer to the diagram engraved in the tray.
NOTE: Do not load envelopes while the printer is printing.
3. Slide the paper-width guides in the tray until they touch the edge of the stack of envelopes, and
then reinsert the tray.
4. Pull out the output tray extension until the intended paper size is reached.
Load cards and photo paper
To load cards and photo paper:
If your printer has a second tray (Tray 2), do not insert cards or photo paper for printing in this slot.
1. Pull out main input tray.
ENWW Load paper 25