elal
The screenshot is not interactive like the RadarBox screen. It's simply an image sent from my RB software every minute.
I'm no RB expert and there are many experts on the main forum.
The very basics on the screenshot are that blue a/c are cruising, red a/c are taking off, green a/c are on approach/landing, white single a/c is currently selected a/c in RB software, and white circle with x in are timed-out a/c that have gone out of signal range.
To the right of the FL (flight level) details or height in feet is the climb and descent rate per minute, then speed:
Example:
FL118 +29 397kt
Currently at 11,800ft climbing at +2900 feet per minute doing 397kts ground speed.
The red circles are VOR (VHF Omnidirectional Range navigation system) markers.
The jagged/comb lines are airport centre lines marked with the ICAO four character airport codes.
We also have purple a/c trail lines.
Hope that helps.