Thanks for the reply Keith. Unless I misunderstand, both your answer and @anon77235960 seem to imply I’m only concerned about the fading scroll bars in one app, either Terminal or Thundar. But on the default desktop theme (Arc-Darker) of the EndeavourOS install I recently downloaded, all the apps have the fading scrollbars, not just Terminal and/or Thundar. So just replacing one or both of those apps doesn’t fix it for me.
But after I posted I continued to search for a solution, and apparently this “feature” I call fading scrollbars is called GTK Overlay Scrolling. And I found complaints like mine in other forums.
So what I found as a solution for me was to disable the fading by adding an environment variable to the file:
/etc/environment
GTK_OVERLAY_SCROLLING=0
And then I set a fixed width to the scroll bars by creating the CSS file:
/home/username/.config/gtk3.0/gtk.css
Added this CSS code and set my preferred pixel width:
scrollbar slider {
min-width: 15px;
}
Logged off and back in, and the annoying fading scrollbars are gone in all apps.
Thanks guys, for your replies and help.