HP Deskjet 6620 Color Inkjet Printer - Manual (Page 142)

3. Release the paper lever.
4. Slide the paper-width guide against the edge of the envelopes.
Printing
1. If necessary, open the Page Setup dialog box and set the paper size, scaling,
or orientation options.
2. Open the Print dialog box.
3. Select the Paper Type/Quality panel, and then select the following settings:
• Source: Rear tray
• Paper Type: Plain paper
4. Select any other print settings that you want, and then click Print.
HP Deskjet 6600 series printer User's Guide
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