Ever wondered what the precise commands are for each entry under the 'Settings' menu in a default installation of xfce4?

xfce-setting-show
xfce-setting-show backdrop
xfce-setting-show display
xfce-setting-show file-manager
xfce-setting-show keyboard
xfce-setting-show mouse
xfce-setting-show orage
xfce-setting-show printing_system
xfce-setting-show session
xfce-setting-show sound
xfce-setting-show splash
xfce-setting-show ui
xfce-setting-show wmtweaks
xfce-setting-show workspaces
xfce-setting-show xfwm4
xfce4-appfinder
xfce4-autostart-editor
xfce4-menueditor
xfce4-panel -c
thunar-volman-settings

This was found using the desktop entry files:

grep -h ^Exec /usr/share/applications/xfce*.desktop | sed -e s/^Exec=// | sort -u

You can also at look the filenames inside $prefix/lib/xfce4/mcs-plugins, here is yet another way to find the names:

/bin/ls $prefix/lib/xfce4/mcs-plugins | cut -d_ -f1 | sort -u