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5.3.3. Change region area to interior/exterior-After a region is created it becomes by default “Interior” region, the region area is theinterior portion of the region rectangular border line.A single left mouse button click outside the region rectangle will convert the regionfrom “Interior” to “Exterior”, meaning- the region area is all the image area outsideof the rectangle.A single click inside the rectangle will convert back “Exterior” region into “Interior”region.5.3.4. Terminate region-A single left mouse button click inside the region rectangle of “Interior” region oroutside the rectangle of “Exterior” region will terminate the region definition and itsrectangle will be removed from the image.