I was happily surprised to find out that the "Font Management" System Module is able to generate a preview of all selected fonts at once. Great feature! Since I only accidentally found out about this, here two ideas of how to improve the discoverability: 1) Add some text indicating that selecting more than one font generates a short preview of all selected fonts 2) When a Group is selected, automatically create a preview of all containing fonts (currently, when the user selects a Group, the last preview is kept until another font is selected)