We are creating a new portal using UI Builder and want a fixed top header and fixed left-side navigation, similar to the ServiceNow Classic UI where the banner and navigator stay constant and only the right content area changes.
We tried building this inside the page body, but faced layout and responsiveness issues.
So we want to understand:
• Is App Shell the recommended place to create a fixed header and navigation?
• Are there best practices to achieve this layout in UI Builder?
• Will implementing this at the App Shell level allow easier future customization?
Any guidance would be appreciated.
