Hi @LuisaMariaO,

What Workspace are you trying to modify? Using the CSM Workspace as an example, you need to navigate to the UI Builder and edit the page or individial compomnent such as a list component there.

See screen shot below of the UI Builder and CSM Home page.

Here's also a link of the high level instructions and overview of Editing a page: https://docs.servicenow.com/bundle/washingtondc-application-development/page/administer/ui-builder/t...

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Thanks, Robbie