// This macro sets the Over/Under threshold colors to yellow and cyan.
// Add these two lines to the "AutoRun" macro in StartupMacros.txt
// to have the Image>Adjust>Threshold tool always use these colors.

    call("ij.process.ImageProcessor.setUnderColor", 0,255,255);
    call("ij.process.ImageProcessor.setOverColor", 255,255,0);