Hey Tilo,
thanks for sharing the screenshots and I agree that in your case a wider max width would be necessary. As pointed earlier this is already possible if you put --grid-max-width: 1600px; in the WebPortal theme.css and replace the 1600px with some larger number. But keep in mind these two remarks regarding this approach:
- it will change it for all WebPortal pages
- it is not an officially supported variable and might change in the future
I created a ticket to solve this properly (internal reference UIEXT-1233)
Greetings,
Daniel