I'm new here and I need an answer to a specific question to which I did not find any useful answer despite the fact that several other people here had asked some more-or-less similar questions.
Well, here is the fact: today I have found a nice wallpaper on the internet and I have installed it not by downloading, like usual, but by choosing the "lazy" way - just by clicking on "set as desktop background". Soon after that, I have found another one and I did the same, not being pleased with the second one, I have decided to return to the first one.
And this is how I have discovered that I don't know where to take that lost wallpaper from! I the wallpaper folder it is not, in the photos folder, obviously, it is not, but I imagine that there must be a place somewhere, where the it is kept saved but I don't know where to look and how to reach it.
So, please, help me solve this. I repeat, I am a newbie, I need ABC-style explications.
I have tried to look for the file in Home folder, but I could not find it, be it invisible or not. Thank you!