Here is a launcher using Unity quicklists (right click menus) to provide you with rotation options:

The result will be something like this:

You just need to follow these steps:

1. Create a new text file with this content:

   
   
   

   [Desktop Entry]
   
   Name=Rotate Screen
   
   Exec=notify-send 'Choose an option from the quicklist' -t 2000 -i rotate
   
   Terminal=false
   
   X-MultipleArgs=false
   
   Type=Application
   
   Icon=rotate
   
   StartupNotify=false
   
   X-Ayatana-Desktop-Shortcuts=Normal;Inverted;Right;Left
   
   
   
   [Right Shortcut Group]
   
   Name=Rotate Right
   
   Exec=xrandr -o right
   
   TargetEnvironment=Unity
   
   
   
   [Left Shortcut Group]
   
   Name=Rotate Left
   
   Exec=xrandr -o left
   
   TargetEnvironment=Unity
   
   
   
   [Normal Shortcut Group]
   
   Name=Normal
   
   Exec=xrandr -o normal
   
   TargetEnvironment=Unity
   
   
   
   [Inverted Shortcut Group]
   
   Name=Invert 
   
   Exec=xrandr -o inverted
   
   TargetEnvironment=Unity
   
   




2. Save the file with a .desktop extension.



3. Make the new file executable (it will be called "Rotate Screen") through
   
   Right click → Properties → Permissions tab → Allow executing files as program


4. Click and drag the file onto the launcher.