Display Rotation Menu provides an easy and quick way to set the rotation of your monitor. You may press Command-Option-Control-0 to put the main display into landscape mode. This is handy when you switch to portrait mode and there are too many menu items to show the Display Rotation Menu. As OS X does not support rotation on all graphics card / monitor configurations, a message like Rotation Not Supported will be displayed in the menu.
By default, only five service menu items will be displayed on a contextual menu
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