The Story Settings property panel is almost the same as the Interface Settings Properties Panel, but with a couple of story specific actions. To open it switch to Edit mode and click on an empty space on the page. (If you've closed the Properties panel, you'll need to double-click, or slide it out with the button appearing at the right of the application.)
You can rename the story by typing in a new name in the Name box. This will change the name of the story everywhere.
Edit story itemswill open up the settings for the story displayed in the page. See Story Model Content below.
This is almost the same as for an interface page, except that the default page naming uses the story name followed by a page number, and the application of a template is to all pages in a story.
The story content panel is the same as the panel for the Model View object. To open it double click on the Edit Story Items button.
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View Story/Interface Settings will return you to the general interface settings (as described above) for this page.