HP Officejet Pro 251dw Printer series - Manual (Page 22)

2. Insert the envelopes print-side down and load according to the graphic. Make
sure the stack of envelopes does not exceed the line marking in the tray.
NOTE: Do not load paper while the printer is printing.
3. Slide the paper guides in the tray to adjust them for the media size that you have
loaded, and then reinsert the tray.
4. Pull out the extension on the output tray.
Load cards and photo paper
Use these instructions to load cards or photo paper.
1.
Pull out Tray 1.
Chapter 1
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