why? I often want to sync different midi notes or warpmarker etc. to a specific position in the arrangement, therefore I need a kind of marker. In cubase I just use the 'play position line" (the black line you see when you hit play) as a "sync" marker because you can see it in every editor and just place it with the mouse where you want it.
I don't find a way to do this in ableton.
I just made two pictures, I guess you can easily test it and see what I mean.

