The Slides widget shows different views of your scene. It only reads the slides captured in the web scene. To create slides in Scene Viewer, see Capture slides.
Each slide stores the state of the scene. A state is the camera position (or extent of your scene), environment settings, selected basemap, and status of the layer visibility. If you navigate to a different view in your scene or change layer visibility, you can click this slide to turn your scene to the state you previously saved in the slide.
Configuring the Slides widget
This widget can be set to open automatically when
an app starts. Hover over the widget and click the Do not open this widget when
the app starts button 
to change the setting to Open this widget automatically when the app starts. (For widgets that you need to add to the app first, you can turn on this option after configuring the widget.)
There is no configuration in the Slides widget.
Using the Slides widget
- Click the Slides widget to open the slides pane at the bottom of the app. If the web scene does not contain any slides, nothing displays in the pane.
- Click a slide to change the view of the scene.
- Click the Slides widget again or the X icon on the pane to close it.