Re: selection

Posted by Wayne Rasband on Apr 23, 2006; 6:26pm
URL: http://imagej.273.s1.nabble.com/selection-tp3702986p3702987.html

> I want to select a region of doughnut-like shape within
> my image. However, since the selection I want to make is
> irregular shape, it is difficult to make a proper selection
> by using [Edit -> selection -> Make Band...]
> command.
>
> Is there any way that I can un-select the portion of field
> from an already selected field?

You can make a doughnut-like selection by creating a selection and  
then creating a second one with the alt key down, which will be  
subtracted from the first.

-wayne