- currently only distances work. - user preferences, edit section to set the units and scale. - option to display pairs (nicer for imperial display?) - support for evaluating multiple comma separated values eg: 2',11" ..or.. 5ft, 4mil - comma separated expressions/values accumulate 1+1,2**3,4cm/3 - attempted fast conversion from a value to a string so button drawing isn't too slow. * imperial long/short * - mile, mi - yard, yd - foot, ' - inch, " - thou, mil * metric long/short * kilometer, km meter, m centimeter, cm millimeter, mm micrometer, um nanometer, nm picometer, pm