Resolved Issue: Gizmos suddenly not visible in Editor

Since yesterday suddenly the scene view doesn't render any gizmo's or other things like point-light and audio ranges.
I tried restarting Unity and even my computer but it stays like that.
All gizmos are enabled, and toggling "3d icons" doesn't change anything.

Is there some kind of setting for this I don't know about?

I'm using Unity 2019.3.6f1


(by the way, something completely different: how does the forum here decide what tags I can use? cause there are never any relevant tags in the list, it's baffling really.)

 

What about the gizmo button itself, the area around and to the left of the pulldown arrow? The individual bits are all in the pulldown, but the overall button must be on too.

 

Yes, that was it, found it out yesterday. I had no idea the title itself was a button. A really weird design chose by Unity IMO
thanks for the reply!