I can't find the Screencast Keys which allow me to start the display. I have tried the right hand pop-up menu using the hotkey N, but I could not find the Screencast Keys menu which is usually located under the Transform orientations rollout.
download it ( RMB > Save Link As… in most browsers, to save it as a
Click install from file in ⎈ Ctrl⎇ AltU>User preferences > Addons:
Select the downloaded file:
If you want it to stay enabled after quitting blender, be sure to click Save User Settings.