Search notes:

~/.config/xfce4/xfconf/xfce-perchannel-xml

~/.config/xfce4/xfconf/xfce-perchannel-xml to store a user's xfce4 Xfconf database in XML files.
The frontend for reading and manipulating this database in the GUI is xfce4-settings-editor and in the shell xfconf-query. But see also xfce4-settings-manager.

See also

There is also xfsettingsd, a daemon that applies various settings (to the database?)

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