There are many times when you need to convert the Background layer to a regular layer, and there are many ways to do it, including clicking on the padlock on the Background layer in the Layers panel. But what about the other way around? It’s not as common, but you will run into times when you need to convert the bottom layer into a Background layer. There’s only one way to do this and it isn’t as obvious. Choose Layer>New>Background from Layer. Yeah, you could’ve been hunting for that one for a while. 

This tip originally published in Colin Smith’s “Photoshop Tips” column in the November, 2022 issue of Photoshop User magazine.