the tool diameter. when I shift-click, I can make retouches with the retouch tool, in a straight line from click 1 to 2 to 3 etc. Good for straight lines like cables etc. But I used to be able to change the diameter of the tool and still SHIFT-click, so I could erase a small pole to a larger reflection of the pole in the water. This does no longer work: it works for as long as I keep the same diameter, but no longer when I change the diameter.