Learn how to change your HTML font and size with this video. First go to edit menu> preferences and then select fonts. Here there are many fonts that have their own categories-proportional font, fixed font and code view. On the right hand side, one can even change the size. Once the settings are changed, click on "OK". That's it, the font as well as its size are changed. It will help while working on the software for better viewing in case of small screens.