Perfect. That is EXACTLY what I needed. Thanks so much!
> Hi Daniel,
>
> On 25.07.2014, 5:00 PM, J. Daniel Fenn wrote:
> > I feel like this should be obvious, but I must be blind. How do I
> > edit an ROI once it is created?
>
> you have three options to edit the selection:
>
> - Use the *Selection Brush Tool* [1] that you activate via the
> right-click menu on the Oval selection tool. You can add to your
> selection with *Shift*, and subtract from it by pressing *Alt*.
>
> - When editing the mask (i.e. the binary, black-and-white image), you
> can use the Brush Tool [2] with black or white color and then create
> the selection using 'Edit > Selection > Create Selection'.
>
> - Store your selection in the ROI manager (by pressing 't')[3]. Then
> create a new selection with what you want to subtract, store it,
> select both ROIs in the manager and use 'More >> XOR' in the ROI
> manager window. (This however only works if the part you want to
> subtract is entirely within your original selection. I just listed
> this option for completeness.)
>
> Hope this helps,
> Jan
>
>
> [1]:
>
http://imagej.nih.gov/ij/docs/guide/146-19.html#sub:Brush-Selection-Tool> [2]:
>
http://imagej.nih.gov/ij/docs/guide/146-19.html#sub:Brush> [3]:
>
http://imagej.nih.gov/ij/docs/guide/146-30.html#sub:ROI-Manager...
>
>
> On 25.07.2014, 5:00 PM, J. Daniel Fenn wrote:
>> I feel like this should be obvious, but I must be blind. How do I edit
>> an ROI once it is created?
>>
>> For example. If I make a selection mask, and add it as an ROI after
>> doing an image threshold. There are parts of the selection I would like
>> to manually edit out. I can't figure out how to do that, and I clearly
>> can't come up with a good search phrase to find an answer.
>>
>> Can someone give me a push in the right direction?
>>
>> I kind of want to circle an area of the selection and "subtract" it away
>> from the original selection. Kind of like one would do in photoshop
>> selections.
>>
>