LEFT ALT + MID MOUSE: UV & 3D -> translate
LEFT ALT + LEFT MOUSE: UV -> - 3D -> rotate
LEFT SHIFT + LEFT MOUSE UV & 3D -> more separation weight (red)
LEFT SHIFT + LEFT MOUSE UV & 3D -> less separation weight (blue)
LEFT SHIFT + MID MOUSE UV & 3D -> remove any color and set weight to 0 (white)
LEFT SHIFT + MOUSE SCROLL UV & 3D -> Smaller/Larger intersection circle
LEFT CTRL + CLICK LEFT MOUSE UV -> Fix/release constraint (green)
LEFT MOUSE (DOWN/DRAG) UV -> ADD/UPDATE constraint (blue)
LEFT MOUSE UP UV -> RELEASE constraint
(should not be needed with proper painting)
TAB + LEFT MOUSE UV & 3D -> Remove separation influence (green)
TAB + RIGHT MOUSE UV & 3D -> Higher separation influence (cyan)