Tap Features:

Double Tap 6 to Unlock Tap Functions / Single Tap to Lock tap functions.
Centre to Zoom. (Multi)
3 to adjust Brightness.
9 to toggle Dim – Auto / On / Off.
Between 10 & 11 to toggle Face.
12 to rotate Bezel.
Between 1 & 2 to view Caseback.
Second Hand Battery Reserve in Dim.