You can use immersive blocks in order to make your StoryMap even more interactive. They are a nice way to add variety to your story, and can be useful for specific purposes such as making a presentation or guiding readers through a series of points of interest. Once such feature is Sidecar.
Sidecar is a scrolling, slide-based block that has two layout choices, both of which provide powerful narrative tools. The floating panel layout is ideal for visually striking media with short captions or descriptions (it's similar to the immersive section in our classic Cascade app). The docked panel layout is optimal for longer narrative content, as it doesn’t overlap the media.
You can access Sidecar through the Block Palette under the Immersive components:

