Launch Terminal from your Applications:Utilities folder.
Input the following command: defaults write com.apple.iCal IncludeDebugMenu 1
Launch iCal or restart it if its already open.
Notice there is a new debug menu with numerous options.
One useful option can be found under Top Sekret which lets you change the Days In Week View to 14, 21, or 28.
Another useful option is the ability to open multiple iCal Calendar windows with Command+L.
To disable the debug menu just open Terminal again and input defaults write com.apple.iCal IncludeDebugMenu 0
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