Hello!

I need a ruler of fixed length (10 microm) always visible on my Image J window, which I can move and rotate as I wish. Is there any plugin to have such a tool?

Or, otherwise, is there any way to "graduate" a structure - eg a line that recapitulates the length of a dendrite - just like a scalebar in order to count the number of some details of the picture, sector after sector?

Thanks in advance to whom will answer me,

Best,

Giulia