How to reset or change behaviour of mouse cursor in impoly/imroi ?

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agatte 2016-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/314814-how-to-reset-or-change-behaviour-of-mouse-cursor-in-impoly-imroi

I have question concerning reset of interactive behavior of mouse. When I click on button and activate mouse to create a ROI on the image. But user did it by mistake and want to select different option and then user click on listbox and once more on button ROI. How can I reset ( option impoly with cross like this : +)? How to reset interactive behavior of mause ?

I would appreciate any help or hint.