You can modify the font style, size, and weight for your entire device, which will then reflect in most apps, including Samsung Notes and Messages.
Samsung Galaxy Note , managing fonts is primarily done through the system-wide settings. While individual apps like Samsung Notes typically use these system fonts rather than having independent font style menus, you can still customize the appearance of your device extensively. How to Change System Fonts fonts for samsung galaxy note
How to adjust the font size and style on your Galaxy phone - Samsung You can modify the font style, size, and