What do the three semi-circles/traffic cone thingy on the camera display mean, and how are they triggered?
Touch the traffic cone thingy and find out.
Suppose app A is on top and Camera is on the bottom. I touch the "traffic cone thingy (TM)". Is there a one-touch way to undo?
The icon is meant to suggest measuring and displaying the distance
to nearby objects, like traffic cones, with the car's sonar sensors, if any.