I do not understand your question Stefan. What you may be able to do is provide a new url to return to an 'other view' if you have code in your app to 'save' a list of places (plus codes ?) previously visited.
This tells you what you can do with the WebViewer User Interface.
It is not a full featured browser so I am not sure it is possible to go back to a previous view.
I might be possible to use these Methods
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GoBack()Go back to the previous page in the history list. Does nothing if there is no previous page.
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GoForward() Go forward to the next page in the history list. Does nothing if there is no next page.
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GoHome() Loads the page from the home URL. This happens automatically when home URL is changed.
If this doesn't work, you could try the WebVIewExtra or the CustomWebViewer extension.