I remember in early(ish) Linux, the terminal programs had a setting to be at least partly transparent, so your desktop background (and other windows? I forget) could show through.
Wound up constraining what desktops you could choose, and how you had to set up your terminal colors. And since I prefer dark text on a light background, it didn't work for me from the beginning.
I imagine those programs still have those settings, but I don't see that behavior in screen-shots of programs any more.
This can be a surprisingly useful tool at times - I've definitely used it to advantage when doing creative coding so that the graphic or animation is displayed behind my terminal and I can see and edit the code at the same time as viewing the effect without switching windows.
Of course, a second monitor can do this too and without the downsides, but sometimes you're away from your desk and it's a nice workflow.
Wound up constraining what desktops you could choose, and how you had to set up your terminal colors. And since I prefer dark text on a light background, it didn't work for me from the beginning.
I imagine those programs still have those settings, but I don't see that behavior in screen-shots of programs any more.