Face rotation in edit mode Blender 2.79

how to rotate faces in edit mode which will match to anather vertices make faces as we require fo details look up the video link below, he is pressing (control A) to reroute faces but i cant do so why?

Rotate edge doesn’t have a shortcut by default. See the 2 minute mark of the video.

how innocence of me did,nt watched it, by the way thanks for your kind support