QUICK ANSWER To change the default font in Outlook on Windows, head to Settings > Mail > Compose and reply, then select your default font and size under Message format.

Microsoft Edge lets you adjust the default font size and styles to improve the viewing experience, and in this guide, you'll learn how to perform this task.

Learn how to create, change, and manage Views in Outlook by customizing the font, font style, and size of a folder by using the advanced view settings.

Better ClearType Tuner helps you fix blurry font issues & apply the same font-smoothing on multiple monitors if you are using Windows 11/10.