When you log on to your LearnWorlds school as an admin you will see your dashboard at first, and all the choices in the Pages Builder tool on the left side panel!

By clicking on the options in the left panel, you can have access to your Course Manager, the Site Settings, your users' profiles, your sales records, analytics, and general settings regarding your school.

In courses, pages, and apps, if you want to see the changes you are making in a Preview Mode (seeing what your students will see) then you can simply click on the magnifying glass on the top of the page you are editing: