AgOpenGPS 6.6.2 screenshot question

Good afternoon. I have a question about an piece of information that pops up on my AgOpenGPS screen when I get close to an end-of-field boundary [see pic below for reference]. I don’t recognize it from any of the online documentation. The number next to the red “x” increases the closer I get to the boundary. Once I’ve turn around and am heading away in the other direction, the notification goes away. What does this mean? Thank you.

You have activated U turn (see the green U just right of red X)
Deactivate by pressing U arrow in the right panel again.

Pressing the X will abort the U turn when autosteering.

30 indicates distance untill U turn is finished.

Normally a green number at same place as 30 will count down the distance until U turn start.

Thank you very much!