I use an addon called PhanxFont, it changes the font, and most importantly, font scaling. However, there’s a limited list of available fonts and no button on the addon pane in game to add a font. I was trying to add it via the folders, but I couldn’t see where to do that.
[Note: this addon DOES over ride anything in the fonts folder located in the WoW retail folder - I replaced the eyesore that is Morpheus with something more legible, but when I tested the addon, it over rode this with its own copy of the Morpheus font.]
Here’s the github, if anyone more tech savvy than I can find out how to add or replace a font, or if it’s even possible [I can’t post links, so just erase the spaces];
github . com/phanx-wow/PhanxFont