Well let's see. I have been told that what I wanted was not possible in Gnome, I have been told I should just settle for what other people thought I should want, and I have been told that the Gnome developers have made certain design decisions that we should all just accept. And then when I rejected those things, I was told I should be "more civil".
If in another five or ten years everyone turns to an AI for answers, or I should say, if by then AI's have started giving accurate information so that no one has use a forum such as this, everyone will be bemoaning the lack of use of the forums and how they had "community" in the old days. But what I have experienced here will be exactly why no one will want to use an online forum anymore. AI's don't get bent out of shape if you reject their first proposed solutions as unworkable in your situation
I didn't come here for moralizing
I didn't come to be told how I should behave
I didn't come to be told what I should settle for
I didn't come here to be told to enable a feature that would cause a bright blue box to float around on my display (though I understand why at first people might have at first thought that was a good solution).
Most of all I did not come here to make anyone feel good about giving unworkable answers in my situation. Be adults for crying out loud, what can be a good solution in one situation might be the totally wrong approach in another. Solutions are like underwear, one size does NOT fit all.
I came to ask if a certain kind of software was available. My mistake was not realizing that the word "screensaver" apparently has negative connotations in the Gnome community, but then, how was I even supposed to know that?
I did appreciate the help, but I did not appreciate the admonitions to be "more civil". But that's all I will say about it. I am still looking forward to the day when you can ask an AI a question and get CORRECT answers instead of made up garbage.
Any decent image viewer should offer a full screen option. You can easily obtain or create a 1x1 back (#000000) PNG image, open it with your image viewer and make that image full screen. Closing this on your return should be straightforward. You can make this as clever and automated as you want.
For a limited example: the GNOME Loupe image viewer, which I have installed as a Flatpak, is very basic and can't launch directly into fullscreen, so I can runpress F11 to make it fullscreen, then control-w to close the window.Code:$ flatpak --user run org.gnome.Loupe black_pixel.png
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