Visual only
Edge marks windows; it never controls them.
About Edge
Edge is a small macOS utility that color-codes your windows so you can find them instantly. Pick the apps that matter, give each one a color, and they'll always stand out without changing how a single window behaves.
We rely on spatial memory to navigate our screens, but that memory breaks down when every window looks the same flat gray. Edge fixes that with the lightest possible touch: a color on the edge. No tiling rules to learn, no layout it forces on you, just a visual cue that makes a crowded desktop legible again.
Edge is built by 0001, solo and deliberately small. It's one of a family of focused tools that share the same idea: do one thing well, respect the people using it, and stay out of the way.
Edge marks windows; it never controls them.
Your data stays on your Mac. Always.
We'd rather match macOS than show off.