New documentation available at https://docs.openkm.com/kcenter/
The documentation at the https://www.openkm.com/wiki is definitivily deprecated.
Consider only use it, if you are user of OpenKM version 6.2 and older.
Click in the banner to close the warning.
The graphical appearance of the system can be changed by the user depending on the templates defined by the administrator. This option is available from the "Tools / Appearance" menu.