2 Iron

RE: Dell Display Manager Hotkey Request

There are command-line parameters that allow you to do some of this.

  ddm.exe /IncControl 10  //to increase brightness

  ddm.exe /IncControl 12  //to increase contrast

  ddm.exe /DecControl 10  //to decrease brightness

  ddm.exe /DecControl 12  //to decrease contrast

Use in conjunction with ordinary Windows shortcuts to bind to hotkeys of your choice.