I seem to have accidentally toggled some debug mode where clicking selects stuff. How to disable?

https://preview.redd.it/3d45ekj415hh1.png?width=118&format=png&auto=webp&s=e008839e72600a94f7b43994ae645eb0d63c1331

Looks normal in editor, but after launch, clicking a button does not actually click it, instead selecting the clicked UI element iwth some orange square. Seems I toggled some debug option by accident. What is this and how do I go back?