Wind
Where the wind is coming from, and how strong
What it is for
The wind can be in your face, at your back or from the side — and the arrow shows which as you go round the lap, turning with your car. On a long straight, a headwind or tailwind is worth tenths.
If the wind is weaker than the speed you set, it barely matters, so the arrow is hidden.
What you can tune
The wind speed below which the arrow isn't shown.
You can show the wind speed under the dial, in km/h or mph as set in Settings. Or keep just the arrow.
Size, position and when it shows are set the same way for every widget.
Where you change it
Each change takes effect at once — there is no apply button.