In the center of the photo you see a stitching mistake.
		For correcting we use a template. There is a template for vertical corrections and another one for horizontal corrections. The correction is made along the long red line by parallelogram shaped distortions of the areas between the blue lines. The areas above and below will be compressed or stretched. All lines can be moved with the mouse. The short red lines are grips for adjusting the distortion. You can make 100 corrections and undo them again.
		The template for vertical corrections is placed over the mistake.
		The left side is moved a little bit upwards, the right side a little bit downwards
		After clicking "OK", the correction will be executed. After that, you can close the window (saving is not necessary), the program uses the corrected photo for further working steps.