Sorry for the delay in the response.
But, I have not found such option in the settings. I looked both during a game and in the main menu, it never showed up.
I'm using the latest version, the v1.2.0.
There are all the settings I have available:
Weird. It should be under Gameplay, but the one you are showing is shorter than the version I am seeing. When I click the settings cog, below Auto-scroll, there's a Base Font Size and then Font Family settings.
