After launching your computation, click on mono-desired scale. You'll see it appear as and when calculating the various measures calculated images.
To enlarge an image simply click on it. To close it click the button just above the image provided for this purpose.
You do not have to close the picture to change the larger view, click directly on the desired image.
Finally, if you want all your images on the same scale, select the same scale down your tab single scale.