Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/openSUSE_Tumbleweed/X11:xfce:4.21.repo
zypper refresh
zypper install xfce4-settings
Para openSUSE Slowroll execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/openSUSE_Slowroll/X11:xfce:4.21.repo
zypper refresh
zypper install xfce4-settings
Para openSUSE Factory execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/openSUSE_Factory/X11:xfce:4.21.repo
zypper refresh
zypper install xfce4-settings
Para 16.0 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/16.0/X11:xfce:4.21.repo
zypper refresh
zypper install xfce4-settings
Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.21/15.6/X11:xfce:4.21.repo
zypper refresh
zypper install xfce4-settings