Reading list: Can I convert a vertical storyboard into horizontal (and vice versa)?
Yes, you can convert a vertical storyboard into a horizontal storyboard and vice versa, depending on your project needs. Both storyboard formats are flexible and can be adapted by adjusting the frame orientation, resizing panels, or rearranging the sequence of shots. The key is to follow clear storyboarding techniques—such as maintaining consistent aspect ratios, focusing on shot composition, and ensuring smooth visual flow—so that the story remains easy to understand even after conversion.
Conclusion: Choosing the right format depends on where your content will be displayed. Use vertical for mobile and social media, and horizontal for film or YouTube. Converting between formats is possible, but always apply proper storyboarding techniques to keep your visuals effective.

https://murphy.inc/vertical-vs-horizontal-storyboarding/