@SebasFC @Vivaldi no, I haven't tried that yet. You mean the vertical desktop toolbar section, don't you? (I'm on mobile now) I played a bit with it the other day and wound up creating a tool icon for a web site by mistake (that I removed again). So you can customise anything there.

But I'm sure @Vivaldi will reply tomorrow once office hours begin. They're usually active and helpful here on Masto.