Most screens do not allow you to navigate back to the previous screen you were on, so you have to keep re-navigating to where you initially were.  Example: I am working on the event and I want to create a new session.  When I navigate to the session and am ready to save, some screens have "Save and Close" and some just have "Save".  I would like to have that screen close, so that I am back to my event record I'm working on.