Window Decorations

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https://bbs.archlinux.org – I'm relatively new to Linux, I've used easy distro's like ubuntu GUI version, crunchbang, stuff like that, everyone told me arch was the hardest for a beginner, so i tried anyway on virtualbox, i'm currently running it, i got arch installed, xorg and KDE installed, as well as openbox, everything seem's fine except i'm having a very simple problem i'm sure..i went into window decorations to change the appearance, but when i select one and hit apply, it doesn't change? i tried logging out and logging back in, or rebooting maybe it would work that way but i (HowTos)