On Wednesday 08 February 2017 12.43:43 Dr. Nikolaus Klepp wrote: > This will most likely not solve your problem for GTK3 applications, but you > can try to fix the screens DPI: > > kcontrol / Apperreance / Fonts : Force DPI ... 96 DPI > > For GNOME/GTK please look here: https://wiki.archlinux.org/index.php/HiDPI > > > Nik Thanks Nik, it did solve the problem, at least for the apps I use on that machine (kmail, Vivaldi, Yast). I had never noticed (nor needed) that setting, now I know where to look. Thierry