How to increase the default font size If you like to write emails in large or huge text (the two sizes larger than Gmail's default normal), make the change in your settings. You won't have to ...

Increasing font size does not increase the size of your iPhone's notification banner, text messages, or icons. To do that, go to Settings > Display & Brightness > Display Zoom and select Larger Text.

Learn how to adjust text size on your iPhone for better readability and accessibility. Step-by-step guide for device-wide changes.

How to adjust your book's font size on your Kindle When it comes to reading, the typeface and size used can really make all the difference in terms of a comfortable experience.