Using multiple Page layouts in an application

I want to use different page layouts depending on how the user entered a particular journey. If the user came in via a web-link, I want to show a header graphic. However, if they’re entering via an embed (within another organization’s website) I don’t want to have the header graphic.

I achieved this with @juanchax 's help by adding a second arrangement to my Page Layouts setup with the

Use When formula:
session.start.queryParams.partner =“ACME”