Default fonts setting

due to a system (BigSur) crash my fonts changed…
How to get back the default fonts?

The font of the list view on the left side or the font of the document on the right side? The font size used by main views (e.g. list view) can be changed in Preferences > General > Appearance.

both are set to 11 (text size) but that is the view result!

That’s actually the default setting. However, it’s unfortunately still unclear what exactly on your screenshot you would like to change.