Storyboarding is essentially sketching out scenes from a story and putting them in the right order when developing a video, animation or film. I posit that this technique can be really helpful when writing a manuscript.
Sometimes the most difficult thing when writing a paper is to get the most logical flow of data and information. We tend to start by writing about the data in the order we performed the experiments. This isn't always the best way to build a manuscript. Storyboarding (or having a moveable outline) can be really helpful for starting the manuscript with the most parsimonious logical flow.
The first step is creating all the figures, the second step is putting the figures in order and writing the storyline as you place the figures in the most logical sequence. This can be an interactive process that you can conduct with all authors. I like to use a big whiteboard, or when you are working with colleagues that are in different places, software like Jamboard where it's easy to for everyone to move things around.
This is a helpful article that tells you how to apply storyboards to several different types of writing: https://www.storyboardthat.com/articles/e/the-writing-process
There's lots of software for creating Storyboards. Here's an article that lists some of them: https://blog.hubspot.com/marketing/storyboard-software.