When you are logged in to the administrative side of your site, you may switch to the Reader Experience at anytime by clicking the link at the bottom page. Clicking "View Reader Experience" will take you to that account's view as a patron. It does not mean you can see the view of the reader whose page you have pulled up to view. Rather, it is your account's view as a patron/reader.
The best way to see what your readers see is to create a test account. Set up an account by registering as a family through your site's landing page. Then, log in with the test account to see what your readers are experiencing!