Enable OS X Dock Magnification on the Fly
I accidentally discovered that in OS X Leopard, if you have dock magnification turned off, you can temporarily enable it by holding Shift and Control while moving your cursor over the dock.
This does not appear to work at all in Tiger, and I’ve only tested it in OS X 10.5.6, so it’s possible it may not work below that.
Equally if magnification is enabled Shift + Control will temporarily switch it OFF.
Good tip, I didn’t think to try the reverse. Thanks!