ROI creation
![roi_selection](../oxy_ex-1/images/frap/select_roi.png)
To create a ROI on the image, you can choose between two modes:
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The pen mode allows you to add one or multiple ROI. |
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The scissors mode allows you to cut (remove) into a full shape while retaining the surrounding selected area. |
Then, use the shape tools to draw desired shapes:
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Draw a straight line. |
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Draw a freehand line. |
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Draw the edge of a rectangle. |
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Draw a filled rectangle. |
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Draw the edge of a circle. |
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Draw a filled circle. |
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Draw a free form edge. |
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Draw a filled free form. |