Scroll location problem

Hi, it’s the first time I tried to use Scroll Location with Sparkle 3/Catalina and I miss the thin blue line denoting scroll location. Scroll Location parameters pane (name/position) is present and working.

Is this only my case?

They are hidden when pressing tab (usually accidentally). Press it again to show them.

Duncan, thank you, it worked.

By the way, it’s good to know that tab toggles canvas overlays.