In Terminal copy/paste this:
defaults write com.apple.finder QLEnableXRayFolders 1
Then relaunch the Finder by Pressing Cmd+Alt+Esc.
Press space on a selected folder and admire :)
Update: it seems this no longer works in Moutain Lion.
In Terminal copy/paste this:
defaults write com.apple.finder QLEnableXRayFolders 1
Then relaunch the Finder by Pressing Cmd+Alt+Esc.
Press space on a selected folder and admire :)
Update: it seems this no longer works in Moutain Lion.