In Mac OS X 10.5's Screen Sharing app (the Share Screen button when viewing a Mac in the SHARED section of the Finder's sidebar), you can enable toolbar buttons that will put you in full-screen mode (like Apple Remote Desktop) or allow you to "curtain" (hide the screen of) the remote Mac. You'll need to have the Property List Editor installed, which is part of the Developer Tools included with Leopard. To add the toolbar buttons, you should: Make sure that you've used the screen sharing feature in Leopard at least once to ensure that a prefs file is created. Quit it if it is running already. At the command line (in Terminal.app or an xterm) enter the following, all on one line: open -a "Property List Editor.app" ~/Library/Preferences/com.apple.ScreenSharing.plist In the property list editor which should then open, navigate the tree to ...

	Read more at MacOsxHints
	feeds.macosxhints.com/~r/macosxhints/recent/~3/198095759/article.php