I wnet to aprs.fi and the only thing I say when I moused over a station was the path. I did see a lot of callsigns or station labels that were highlighted, but not a square around the station. At a glance, it lloks like each of those stations provided a frequency.
If you are aksing a question about how thr aprs.fi web site works, you should go to the aprs.fi website or forum and ask the question there. They are the experts on their interface.
From: "N7JJY George n7jjy@... [aprsisce]"
To: APRSISCE Group
Sent: Sunday, December 30, 2018 2:33 PM
Subject: [aprsisce] Highlighted area
Looking at aprs.fi map. Mouse over a station and a pinkish square area lit up around the station. How does that happen and what does it mean ????