(4:30 PM)
hidden dock prefs
My favorite hidden Dock preference is to make the icons of hidden applications semitransparent. Go to the command line and enter:
defaults write com.apple.dock showhidden 1; killall Dock
there's also the option to attach the dock to a corner of the screen:
defaults write com.apple.dock pinning -string start; killall Dock
or, to pin the dock by the end corner:
defaults write com.apple.dock pinning -string end; killall Dock
via DF, and then I realized I hadn't mentioned the 'showhidden' tip here. also: a couple more "defaults" commands.