Can someone explain how to decipher the 'radar screen' in the lower left corner?

Does DJI even bother to explain any of these functionalities?

Perhaps DJI support would be so kind as to elaborate...

And/or someone in the know.

Do not underestimate the power of observation.

Check this link for a useful explanation
http://mavicpilots.com/threads/c ... p.8182/#post-103602

That radar is very important. It has a great deal of information which includes: - Direction that the craft is from you. The little white triange at the top of the circle represents the front side of your controller. This should be lined up with the craft (the blue triangle) for optimal signal.  - The direction that the craft is pointing. When you want to fly the craft home, you orient the blue triangle so that if points toward the middle of the circle, which is toward you.  - The shaded half circle shows your roll (left and right lean) and pitch (forward and backward lean). When you press the right stick toward the left, the shaded half circle will tilt, representing the angle of the craft. This lets you know that the craft is responding.  - In sports mode, the outside of the radar will be the tachometer. When you push the right stick forward and/or left stick forward, the RPM (or Power) will increase and is represented by the line around the outside of the circle. The line goes clockwise around the radar circle. The line is green and with more speed turns blue. For maximum efficiency and max flight distance, keep the RPM/power line near the green/blue intersection.  

geoffz Posted at 2017-2-24 09:31
That radar is very important. It has a great deal of information which includes: - Direction that the craft is from you. The little white triange at the top of the circle represents the front side of your controller. This should be lined up with the craft (the blue triangle) for optimal signal.  - The direction that the craft is pointing. When you want to fly the craft home, you orient the blue triangle so that if points toward the middle of the circle, which is toward you.  - The shaded half circle shows your roll (left and right lean) and pitch (forward and backward lean). When you press the right stick toward the left, the shaded half circle will tilt, representing the angle of the craft. This lets you know that the craft is responding.  - In sports mode, the outside of the radar will be the tachometer. When you push the right stick forward and/or left stick forward, the RPM (or Power) will increase and is represented by the line around the outside of the circle. The line goes clockwise around the radar circle. The line is green and with more speed turns blue. For maximum efficiency and max flight distance, keep the RPM/power line near the green/blue intersection.

Posted the foregoing for those that might be interested as well.  Excepting idiots that make stupid remarks.