When the arrows first disappeared someone gave me this
info:
Among the gtk3 designer's more repulsive "improvements" is the removal
of arrows from scrollbars, so when you have a very long list the slightest
touch of the scrollbar sends the contents zooming off into the sunset.
This can be fixed by creating this file:
~/.config/gtk-3.0/gtk.css
and sticking this magic in it:
.scrollbar {
-GtkScrollbar-has-backward-stepper: 1;
-GtkScrollbar-has-forward-stepper: 1;
-GtkRange-slider-width: 15;
-GtkRange-stepper-size: 20;
}
That worked for a while, but now the designers have apparently
discovered people were circumventing them and changed things
so this no longer works :-).