You can increase the size of on-screen text using Display Mode's "Large display" option.
1.
From the Accessibility screen in Settings, tap Vision enhancements.
2.
Tap Enlarge display.
3.
Tap Apply.
4.
You've completed the steps!
From the Accessibility screen in Settings, tap Vision enhancements.
Tap Enlarge display.
Tap Apply.
You've completed the steps!