How to disable a strange white circle around the cursor in UV editing mode? it is distorting everything once I try to move or rotate a UV island. It sometimes moves all of them at once, despite the fact that only one of them is selected (red). Also I have the impression, that all the UV islands are distorted as if they were fitted onto a globe. I must have accidentally switched something. I never had such a strange problem and I haven't come across anything like this on the Net. I would really appreciate your help, since the way it is now it's absolutely impossible to work:) I am rather new to Blender, I am mostly unwrapping couches and sofas.