Change the Font Size
If you want to change the text font size in both the Email app Home screen as well as within email messages, tap the Menu icon on the menu bar (refer to Figure 4 if you need to) whether you’re in the app Home screen or you’re reading a message on the screen. Next, tap Font Size. In the Font Size window shown in Figure 10, you can see the various font sizes, so you can get an idea of how the font will look on the screen.
Figure 10 The default font size is Small, which is denoted by a green button to the left of the Small font name.
If you want to use the device font sizes instead of sizes specified by the Email app, tap Use Device Font Sizes at the top of the list. After you select a font size, the size of the text on the screen changes automatically, so you can decide if the new size suits you.