HP Linux Imaging and Printing (HPLIP) Help
Printing with HP Device Manager Print (hp-print)
To print using HPLIP you can click the "Actions" Tab in hp-toolbox or run hp-print. Then the hp-print utility will run and will appear as shown below:
From the Device Manager - Print Screen, you can see the file types that are supported as well as selecting which files to print, number of copies and so forth.