Shows the path to the note, including folders. You can hide this under Appearance (Darstellung) settings - “Show tab title bar” or “Zeige Tab-Titelleiste”
The inline title. You can turn that off under Appearance settings. “Show inline title” or “Zeige Titel in Notiz”.
And all of these elements (as far as I know) can be configured with CSS themes/snippets too.