From the administrative side of your Beanstack site, you can switch to the reader experience at any time by clicking the "View Reader Experience" tab on the right side of your screen. This tab will take you to that account's view as a participant. 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 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!