For those of us without hawk-like vision, the font size on incoming and outgoing messages can be a challenge to read. Fortunately, you can change the font size for all your messages. Here's how:
- Open Settings> Mail, Contacts, Calendars.
- Tap on Minimum Font Size.
- Tap on the font size you want to use. The Mail app will use this (or a larger) font size for all messages.