Hi i use Gnome as my current daily DE but i wanted to try out KDE Plasma.
I installed and started sddm and the kde applications.
When i logged out and in i found that the whole thing looked really like kde but for some reason the applications still look like I’m on Gnome: Stuff that uses GTK looks good but Dolphin for example looks really weird:
Install manjaro-kde-settings and that will remove the gnome one … after that, copy .config from /etc/skel/ to your home directory cp -r /etc/skel/.config ~
then reboot … not sure if you will need other files too from skel …