Nice, I suggested exactly the same feature in a topic about difficult to access pulley menus on TJC many years ago. I still think and therefore agree that it’s an extremely simple movement, and it would fit the rest of the UI perfectly.
The only thing it doesn’t solve, however, is that you still need to remember that there is a pulley menu, because pulley menus are not indicated at all if you’re in the middle or at the opposite end of a page. Perhaps, for that purpose, the pulley menu indicator could always show up, but that could look ugly and take up too much screen space.