This topic seems to be too old and there is no activity. I am marking this as a completed with a note.
User interface setting
(Configuration — SDK https://sdk.collaboraonline.com/ documentation)
With Collabora Online 6.4 the systems administrator can set the classic menu + toolbar user interface or the new notebookbar user interface. See the user_interface.mode setting in the configuration file.
With Collabora Online 21.11 the use of classic and notebookbar is deprecated , use compact for classic and use tabbed for notebookbar. See the user_interface.mode setting in the configuration file.
In coolwsd.xml you can change the default value to start UI based on your preference.
<user_interface>
<mode type="string" desc="Controls the user interface style. The 'default' means: Take the value from ui_defaults, or decide for one of compact or tabbed (default|compact|tabbed)" default="default">default</mode>
<use_integration_theme desc="Use theme from the integrator" type="bool" default="true">true</use_integration_theme>
</user_interface>
Thanks,
Darshan