How to switch other tabs when click the back button in backstage page?

Hello,

The Ribbon.IsApplicationMenuOpenChanged event will fire when the Backstage opens or closes.  You can look at Ribbon.IsApplicationMenuOpen to see if it's open or closed at the time of the event.  If closed, you can set Ribbon.SelectedTab to another ribbon:Tab instance from your Ribbon.Tabs collection.

Thanks for your reply. But there is some difference with my situation: Now I have created a start view(one xaml file).When application begin to run , the start view shows , I click start view's buttonA to show the ribbion, then I click the back button (circle with arrow), From the Ribbon.IsApplicationMenuOpenChanged event , It now switch to Start View.But when I click start view's buttonA again to show the ribbon, then the back button is overlapped by ribbon's Tab. Can you give me some advice if you can understand my description?

Sorry but we'd probably need to debug a very simple sample project that shows this to be able to assist.  If you want to make one, please reference this post, email the project ZIP file to our support address, and rename the .zip file extension so it doesn't get spam blocked.  Thanks!