Tap Features:

Double Tap 6 to Unlock Tap Functions / Single Tap to Lock tap functions.
Tap Centre to Zoom. (Multi)
3 to adjust Brightness.
Between 4 & 5 to toggle display functions.
Between 7 & 8 to Start/Pause/Stopwatch – Double tap to Reset. This tap is only available when Stopwatch is active.
9 toggle Dim – Auto / On / Off.
12 to rotate Bezel.
Second Hand Battery Reserve in Dim.