By default, yellow is you and other human pilots on your team, blue is AI and structures on your side, and red is the enemy.
Pink lines and rings: missile locks. Amber reticle: your marked target.
The circle or cone around you is the range of the weapon you have selected.
LEGEND (top left) lists every symbol.
FILTER: which unit types, weapon kinds, overlays and trails to show.
DISPLAY: text size, redraw rate, dark mode, names and colors.
DEVICES (top right). Off by default, home network only. The QR code stays hidden until you show it.
Is the game running? Does something else use port 8123? (You can change the port in the config.)
Feedback and bugs: github.com/Big-LouDE/NOTacMap/issues