How to enter content into Tabs

I am struggling to figure out how to enter content into Tabs. Tab 1 is visible and I can put content into it. I see the other Tabs in the Page Layout View, and on the Page (and when the Project is published all the Tabs work). But I do not understand how to enter content in the other Tabs? When I select a different Tab in the Page Layout, it doesn’t switch out of Tab 1. Ai help isn’t helpful.

Select the tab you want to edit in the Editor Preview section in the inspector

See also: Tabs

:man_facepalming: Many thanks!