Start Points let you choose which Artboard your Prototype starts with when you preview it.
Setting a Start Point
To set a Start Point, open your Prototype in the Preview window, select an Artboard from the drop-down menu, and click .
Whenever you preview your Prototype, you’ll always start with the Artboard you’ve set as your Start Point. To remove a Start Point, select the Artboard in the Preview window and click again.
Setting multiple Start Points
You can set more than one Start Point to guide people through different aspects of more complex designs (for example, a sign up flow and a user settings flow). Every time you set a new Start Point, it’ll appear as a different Prototype in the same document in the web app.