Documentation Mapping

Hi
There is a real Low Documented Part as missing Gropund infos on MAPPING
FIRST and in General connecting to WLED_IP/edit does only work if there is a WORKING Internet connection!! Otherwise BLANK PAGE

Missing info the ledmapX.json does the {“map”:[58,68,80,87,92]} need to have all LEDS in the System as of order String or is it the VIRTUAL String suggested
A: with all LEDS defined in Segment_0
B: only the ones id like to have in the Segment im Effecting

IN segment when calling/applying the effect :
: using the ledmapX.json is then START to STOP the Number in the ledmapX.json starting from 0 or 1