[Inkscape-devel] gradient fill swap (tooltip?)

speaking of tooltips - I can never remember the cntrl key to swap a gradient fill from inside-out to outside-in. I've thought about what would be the best way to do this in the gradient editor or the gradient edit bars but really haven't come up with something good. Maybe an extra button on the type of fill. Maybe dragging the bars from positive to negative would do it or maybe just a tooltip that gives the cntrl key - well worth the dwell :)