Can't find Scrivenings Mode after update

I can’t seem to find the Scrivenings Mode on my Windows version since I installed the update to

Any ideas?

There are several ways to toggle this on. The “View” menu will display Scrivenings at the top, if what you have selected a container or multiple items. Are you saying the 3-mode toggle control on the toolbar is missing?

Got it, thanks. I had forgotten that I had to select more than one item.
Much appreciated.