Binary package “font-viewer” in ubuntu focal

Full-featured font preview application for GTK Environments

 Font Manager is intended to provide a way for average users to easily manage
 desktop fonts, without having to resort to command line tools or editing
 configuration files by hand. While designed primarily with the GNOME Desktop
 Environment in mind, it should work well with other Gtk+ desktop environments.
 .
 This package provides the font-viewer component of Font Manager.