Changing the default, automatic numbering style

Hello list,

When I click on the toolbar numbering button, my current paragraph
(or selection) gets numbered with arabic numerals, and indented.

How can I change the numbering symbols at level 2+ of such an
automatic list, and how can I modify the indentation?

Note: I know about paragraph and numbering styles, but I am
specifically asking about the toolbar button automatic list styles
here.

Thanks,