RF Map feature documentation and setting the antenna location in map

I can’t seem to find any info on the RF Map feature “CTL +w” is there any documentation on it?

Also, is there a way of setting the antenna location to something other than the home position?

Same here,…just stumbled across this feature and found some dashes showing on the Map when “RF-Map” is checked.
What does it show / do ?
Couldn’t find anything in the docs.

…Just played around with it: Is it to show approx. RF range / distribution based on Home location marker and given surrounding topography?
If so, on what power level is it based on? - Average RC?

IIRC specified max range, desired altitude and LOS.

Thanks.
Good to get some info on this.