Page Composer - Hiding a field on a pop up page

Content

Has anyone been able to hide a field using the page composer on a popup page e.g. Assignments? Once you are in the popup page you aren't able to get to Structure anymore. I've tried using escape button to keep the popup live and then looked at the source code but found nowhere to edit it. Looking forward to any tips and tricks.

Thanks,

Jane

Version

21A