This version replaces the old Arrow_.class tool that was present in Fiji before. The main changes are the ability to draw the arrow as a floating selection, and to tune its shape.
Warning: Since ImageJ version 1.43n, a similar tool, made by Wayne Rasband, does a similar thing from the ImageJ core, see here.
Displays a scale bar overlay on the sequence. Warning: this plugin needs correct sequence metadata to be effective. Otherwise it will display wrong values.
