You can change the font size of Spark’s UI to either make the app font smaller so more content can fit on the screen or set a larger font to make emails easier to read. Spark supports Dynamic Type and will fetch the settings and adjust automatically.
Change the font size
Enable Larger Fonts option in System Preferences > Display > Display > Scaled > choose an option to the left to the Default settings.
- On macOS Ventura (version 13): System Settings > Displays > Larger Text.
- On macOS Monterey (version 12): System Preferences > Displays > Scaled > choose an option to the left to the Default settings.
Note: It is available for MacBooks with a Retina display. For additional information and recommendations for non-Retina displays, please check out this page.