The Notebookbar implementation Tabbed Compact is finished and can be tested. Download LibreOffice Master for
- Tools -> Options -> Advanced -> Enable experimental features
- View -> Toolbar Layout -> Notebookbar
- View -> Notebookbar -> Tabbed Compact
And this is how it will look like
The idea of the Toolbar is that you get all actions grouped in different tabs. The benefit is that there is enough space for most actions from LibreOffice and you can show action icons and labels. In addition the UI is sizable.
Download and test it.