Another short post for today, but this one is important. The gnome devs introduced the so called "zoom mode". This one is really, really, really annoying. I can’t imagine why somebody even wants this!! I hate it; I even more hate it, that there is no "disable zoom mode" setting somewhere in the GUI… So, thanks god, I incidentally discovered the solution  .
Add a file
~/.config/gtk-3.0/settings.ini with this content, restart
the relevant GTK application and be happy:
[Settings] gtk-long-press-time = 5000