Hello @AdamR4222. Unfortunately, we do not have a way to set the font size to display one way on mobile and the other on a desktop. However, if you do use a mobile-responsive template, the text will adjust to the size of the screen that it is being viewed on so you won't have to worry about your readers squinting to read your text. It's great that you are taking your mobile readers into consideration. Here are a few more best practices to consider when creating a mobile-responsive email.