Am I just stupid that I can't figure out how to change the background picture without setting up the whole lock screen/home appearance from scratch?
https://forums.macrumors.com/threads/am-i-just-stupid-that-i-cant-figure-out-how-to-change-the-background-picture-without-setting-up-the-whole-lock-screen-home-appearance-from-scratch.2474679/