The user interface library contains different functionality used to support a graphical user interface. Graphic files as fonts, icons and pictures are ".xbm" files containing monochrome bitmap that can also be opened with a normal text editor. These files are coming from the LINUX world.

  Fonts:      must be X axis aligned on 8 pixel boundaries (build into the firmware)

              Normal font   8  x 9    (W x H)         Used in browser
              Small font    8  x 8    (W x H)         Used on display top line
              Large font    16 x 19   (W x H)         Used in numbers


  Icons:      must be X axis aligned on 8 pixel boundaries (build into the firmware)

              Normal icon   16 x 12   (W x H)         Used in browser
              Small icon    16 x 8    (W x H)         Used on display top line
              Large icon    24 x 24   (W x H)         Used as keys


  Pictures:   no restrictions (files in the file system)

              Smallest       1 x 1    (W x H)
              Largest      178 x 128  (W x H)