Yellow line in arrangement window since C11 update

Anyone know what this yellow line/marker is in my arrangement (see attached image)
Seems to have arrived on all my projects since I updated to 11

Can’t move it, or seemingly do anything with it at all…it’s just always there.

it’s a new feature - you’ll find if corresponds to events on the marker or arranger tracks. I think you can turn it off if you want to, though I can’t remember how.

It’s a new Marker Lines feature. Right-click on the Marker track and select ‘Show Marker Lines’ to see the options.

Thanks guys.
Not sure why there is/was a marker there on all my tracks (I dont use marker tracks)
but yes…sure enough, I created a marker track, and there was a marker (named “2”) at that point.