High DPI (dots per inch) screen resolutions, e.g. 4k/UHD/QHD screens in a relatively small form factor, e.g. laptops/tablets. Use this tag for issues relating to the Ubuntu experience on HDPI screens.
HDPI screens are found in some newer monitors where the size of a pixel is shrunk significantly to give a much clearer display. However this can cause problems for applications that rely on pixels being a certain size for their user interface, e.g. those that specify sizes in screen pixels (as opposed to CSS pixels).
