How do I reset a button to it's default instance in the preview? I want it to go to it's default instance by clicking outside it, but I don't know how to do it.

I hope I’m phrasing my question correctly. How do I reset a button to it's default instance in the preview? I want it to go to it's default instance by clicking outside it, but I don't know how to do it. Like when you click a search bar & the cursor blinks & the bar stays highlighted until you click anywhere else beside it. Any suggestions would be very helpful, thank you.