Edit a theme (Notebookbar)

Hi, i would like to tweak a theme for GUI interface (pic attached). Where would I find the documentation related to this? Such as moving or replacing the toolbar and Size of the app tab.

description for pic :

  1. Blue : Tab to be spread equally to the window screen
  2. Red : Some tools i need to remove and add some line between categories
  3. Green : add group name
  4. Yellow : change default size and font
  5. save or export themes so i can install to my colleagues

Any help appreciated, thanks :slight_smile:

nb: im using LO 7.0 with Notebook Bar