Range Map key???

Good day,

I was wondering if someone could explain the range map??

When I zoom out I get four rings, two dotted, and two solid.

I am guessing that the dotted ones are my range and back to point of origin, and the solid, the max range to discharge?

Could anyone please confirm this? as I would like to feel I could "Push" the limits of my range, when there is a need.  Having a good understanding of the app would help.

Thanks for any reply.

Vince..

P.S.  how do you add a screen dump to this message??