Click the Back button on the actions\navigation bar to open the previously-accessed page.
Keyboard shortcut: Alt+B.
The back and forward navigation buttons, as well as the History list, appear in the actions/navigation bar only when page use warrants their appearance.
Note: Under certain circumstances, such as revisiting a page that was
left unsaved after being loaded with default data, a page may not appear as it
did when you left it.