value snapping for drag buttons

[Gravin]

I'd like to have the ability to use use a modifier key (shift, alt, ctrl etc) to alter the way the drag value buttons work for things like size, opacity, etc. The way it is now I have to click and drag several times to make large changes in values. I know I can just click on the value and edit it with a keyboard but I'm working on a cintiq and my keyboard is not always the most comfortable option. If I could press shift and have the values jump in values of 5 or 10 it would be much easier.