Thank you Roberto! That’s exactly what I was looking for.
In my experimenting I had switched to a horizontal menu, so I needed to replace with a new basic menu and then the responsive ‘more’ option started working. I also then could use the layout menu to unselect the “all items are the same size” option and I now can have 10 menu items that appear if the user has a wide browser, and they gracefully collapse into fewer and fewer options with the hidden options hiding under the ‘more’.
Thanks so much for taking the time with the video!