HP Photosmart A310 Compact Photo Printer - Manual (Page 20)

● Do not load more than 20 sheets of 10 x 15 cm (4 x
6 inch) photo paper.
● If you are using tabbed paper, load the paper so the
tab feeds in last.
● In dry conditions photo paper can curl. To prevent
curling, store photo paper in a plastic bag, not in the
input tray of the printer.
1 Input tray
2 Paper-width guide
3 Output tray
16 HP Photosmart A310 series