HP Deskjet 3420 Color Inkjet Printer - Manual (Page 38)

greeting cards
printing guidelines
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Unfold pre-folded cards before placing them in the paper tray.
preparing to print
1. Unfold the paper tray.
2. Slide the paper guide to the left.
3. Fan the edges of the greeting cards to separate them, then align the edges.
4. Place no more than 20 cards in the tray.
5. Push the cards forward until they stop.
6. Slide the paper guide firmly against the edge of the cards.
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