HP 510 - Manual (Page 165)

Best quality settings
If you have selected the Best option as the Print quality setting for your print session but require an even higher
resolution for your print job, you will need to change the Best quality setting.
The Best print quality option provides 600×600 dpi resolution in normal mode and 2400×1200 dpi in maximum
detail mode.
NOTE: Using the maximum detail mode will improve resolution but will reduce printing speed and
increase memory requirements.
Use the following procedure to select maximum detail mode:
Select (using the keys) Then press:
1. Set-up menu Enter
2. Advanced options Enter
3. Best Quality Settings Enter
4. Maximum detail Enter