how to draw an ROI like a ring shape?

Posted by WangPing on Mar 01, 2019; 3:30am
URL: http://imagej.273.s1.nabble.com/how-to-draw-an-ROI-like-a-ring-shape-tp5021865.html

Hello,
I am trying to draw a ring like ROI, but once I draw the outer circle, the inner circle does not show up when I finish it.
Thanks for any help
Ping

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