Stacks Hover Effect

It's been a long time since I've found a Leopard tip that was useful enough for me to implement it myself. But I've just found another one at

This is a hover effect enabled when your mouse moves over an icon in one of Leopard's stacks. Here’s how:

Launch the Terminal and type the following command:

defaults write mouse-over-hilte-stack -boolean yes

then, restart the Dock with:
killall Dock

To disable:
defaults write mouse-over-hilte-stack -boolean no

Found at