But Linux? I'm unhappy that the corners are not rounded and I have no means to change it by myself. Since the Stage is not transparent (or doesn't accept a fill like the Scene), I cannot even cheat.

I've already started playing with the new feature for the integrated header bar.

This should look nice on Windows, and I will prefer this over my current custom solution! (That solution doesn't fully work in all cases.)
I'm sure it will look nice on Macs as well.

Wait. You're actually working there? 🫣
Now I feel dumb for missing the hint.

But THANK YOU for at least considering this! 👍

Thanks Gerrit! I didn't know that!

Guess I will try to reach out to them. If they have something, maybe they could contribute it...?
@bellsoft.bsky.social look who's here! 😅