I know I've asked this before and there was some simple hot key to switch the radial gradient from inside to outside - but after 30 minutes of searching and trying dragging the nodes around (asymmetrical was easy, not complete invert)  So I can't find the hot key - can someone help again ?   Can this be documented better - I couldn't find it in the hot keys list, nor under the tutorials, nor in the "inkscape manual" - maybe it's there somewhere but not obvious (at least to me).