// This macro creates a plot with subscripts
// and superscripts in the axis labels. Requires 
// ImageJ 1.52t or later.

   um = getInfo("micrometer.abbreviation");
   xLabel = "H!!2!!O volume  ["+um+"^^3^^]";
   yLabel = xLabel;
   Plot.create("Demo Plot", xLabel, yLabel);
   Plot.setLimits(0,1,2,30);
   Plot.setFontSize(18);
   Plot.show;