You navigate through the corpus windows by clicking on one of the four "tabs" at the top of the page -- NOT by using the Back and Forward button on your browser. Typically, you use the tabs to (1) search, (2) see the results, (3) see the word or phrase in context, and (4) see even more context. Tab (4) is also used for help files.

When you are creating and modifying Virtual Corpora, or when you are browsing help files, you can navigate through the pages with "Back" and "Forward".

Note: if you are using a smart phone, the help files for the search form, which would normally be in (1), appear in (4) as you click on anything in the search form.