A Microsoft digital storytelling app for creating and sharing interactive reports and presentations.
Hello, Franklin Perez
Welcome to Microsoft Community.
I realize that I know you want toknow what the recommended sizes are for images or banners used in the headers of Microsoft Sway. I understand how you feel.
Which account are you using to sign in Sway? A personal account or a work/school account?
Unfortunately, the official documentation does not provide recommended sizes.
However, Sway does have image size limitations.
I suggest you can try adjusting the size of your image or banner within these limits to ensure it can be successfully uploaded.
For more information, you can refer to:
Sway - pixel size - Microsoft Community
File size limits in Sway - Microsoft Support
Additionally, I have already submitted your requirement for recommended sizes in feedback platform.
Here is a link: the recommended sizes are for images or banners · Community
You can also vote for it or add comments on that page.
The higher the number of votes, the more likely the development team may focus on it and may add the recommended sizes in official article.
Thanks for your understanding and patience.
Best wishes,
Lucia Wu - MSFT | Microsoft Community Support Specialist