To change your font style and or/ increase the size of your font for easier reading:

1. Tap Settings (gear icon) from the UberBar
2. Tap "font"
3. Tap next to "Use default text settings"  to turn that off
4. Change the size of your font and check out the example below to see how it will look
5. Change the style of your font below that
6. Once you're satisfied, click "Done"

Happy Tweeting!