How can I Control The For-You Page Display Width

[Roderic Hennings]

If you mean the Confluence "For You" home feed page:

In Confluence Cloud, the "For You" page (your personalized home feed) uses a fixed layout controlled by Atlassian and doesn't currently have a user-facing setting to switch to full width. The page width is determined by the system design and can't be adjusted by individual users.

This makes the Worked On page and the other tabs harder to work with. Needs to be customizable. I don’t need Confluence telling me how to arrange my work views

[Fabio Racobaldo _Catworkx_]

Hi @Roderic Hennings and welcome,

ForYou page is not customizable for my knowledge. There you can find some useful information based on your recent activities and based on spaces update.

You can edit feed in order to select spaces and/or people that you are interested to see in the feed itself

[Roderic Hennings]

Understood
the problem is Atlassian changed the display width to the reduced from the wider width and this change is what prompted the post.  If you are going to change the display width then best solution is to allow the user to change between new default narrower view and the previous wider view.  especially when the new default offers no benefits to user and forces them to now open cases to see the details they could see easily when the wider view was used.