[who-shot-jr]

There is also https://github.com/FelixKratz/JankyBorders

Bizarre that this has not been fixed by Apple, it has been an annoyance well before Tahoe. Relying on the three dots in the top left corner to see which window is on top gets frustrating.

[phantasmish]

Oh damn, this has been causing me trouble when working in half-and-half and quartered windows as recently as this week. I’ll be installing the one you linked, or the one the thread-link points to. Thanks, didn’t occur to me this would be a thing but of course it is.