HP Deskjet 450 Mobile Printer series - Manual (Page 59)

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Alternatively, in Windows you can open the printer driver and click
HP ZoomSmart in the Setup tab. Then select Scale to fit paper in device
to scale the document to fit the media size currently selected.
Use the card slot for media 4.72 in (120 mm) width or less. Ensure the
paper guide on the slot fits snugly against the media. Adjust the paper
guide on the slot until it fits snugly against the left edge of the media.
If you do not have the Toolbox (Windows) or HP Inkjet Utility (Macintosh)
installed, print a configuration page to check printer media settings for
direct printing. This information will verify whether you are loading the
correct media size and type before printing. See
Printing diagnostic and
configuration pages .
Poor print quality
Check the print cartridges
Replace any low or empty print cartridges, then try to print again.
If your printout is grainy, has stray dots, jagged edges, or the ink is
bleeding into another color on the page, try aligning the print cartridges as
described in
Aligning the print cartridges .
If you are printing with only one print cartridge, see Single-cartridge printing
mode .
If the lines on the printout are broken, one of the print cartridges may be
defective or have clogged ink nozzles. Try cleaning the print cartridges. For
instructions, see
Cleaning the print cartridges .
Check the paper quality
The paper might be too moist or too rough. Make sure that the media you
are using meets HP specifications, then try to print again. It is
recommended to use inkjet media. See
HP Supplies and Accessories for a
list of HP-recommended media.
Ink is smearing
Check the print mode
When you print documents that use a lot of ink, you must allow the pages
more time to dry before stacking them. This is especially true for
transparencies and photo papers. Select
Best mode in the printer driver,
and carefully remove each printout separately and lay each page out to
dry.
Color documents that have rich, blended colors can use excess ink, which
wrinkles the page during printing and causes smearing. Try using the
Normal or Fast ( Draft for Macintosh) mode to reduce ink, or use HP
Premium Inkjet Paper designed for printing vivid color documents.