One reason that I like the Customizer is because I see the options to choose different views at the bottom, full-screen, mobile, etc. However, when I tried to edit a page, I do not see options for choosing a screen size. The toolbar at the top of the screen seems to be quite limited and does not include the option to view the post or page in different screen sizes.
Please let me know how I can do this. I have been searching Google but that’s a rabbit hole that seems to go nowhere.