Posted 13 April 2017 - 04:49 PM
I don't know whether you're talking about the Lock Screen (from which you log in or shows again if you have the "enter password upon waking" setting on) then you use Settings, Personalization, Lock Screen Pane.
For the desktop background it's still Settings, Personalization, but the Background pane.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134
In a modern society where everyone thinks their opinion deserves to be heard nothing annoys me more than individuals who mistake their personal preferences for fact.
~ Commenter TheCruyffGurn on the The Guardian website, 8/13/2014