There is surprisingly not any GUI option in Gnome 3 by default to change wallpaper settings. I use “dconf-editor” for this purpose. It is possible to center, scale, tile or stretch a wallpaper by using it.
“dconf-editor” can be found in the main repositories of Debian. Once you installed it, open dconf-editor, and navigate to: org -> gnome -> desktop -> background. There you will see the pop-up menu which lets you make arrangements on your wallpaper.
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Iโm a US-based software engineer with a background in law. I share mostly practical tech notes here for my future self and anyone who finds them useful.
One of the things Iโve built is Masterlist: Focus & Tasks, a privacy-focused, local-storage-only task manager that offers focus tracking tied to tasks and projects, compatible with the Pomodoro technique.