Since you're allowed to add your own sample text, I always use something like this: efficient, effluent eggs 3690 Il1 GQ To AV Va Yo ... which shows ligatures

Since you're allowed to add your own sample text, I always use something like this: efficient, effluent eggs 3690 Il1 GQ To AV Va Yo ... which shows ligatures (if any), old-style numerals (if any), descenders, the zero in a code font, differentiation among similar-looking characters, and familiar kerning pairs (if any).