On this watch at the lower right, you'll notice three triangle/arrow markings:
(sorry my privilege does not allow me to post an image/link; plz google AQW101)
On this watch mode button= left bottom, light = right top.
When I press and hold bottom right button in regular time screen, a fourth arrow marking (left of the three shown in [GOGGLE] image appears).
This arrow doesn't have a pre-printed halo/outline like the other three next to it (for when it's off...)
What does this mean? Which secret mode did I just activate?