Making Text Easier to Read
If you find that text in standard apps like Calendar, Reminders, and Notes is difficult to read because it is too small or the letters are too thin, you can change that in the Display & Brightness settings.
Open the Settings app and tap Display & Brightness.
You can make the letters of standard text thicker and easier to read. Changing this setting requires your iPad to restart.
Tap Text Size to make the default text larger or smaller.
Tap and drag the dot along the line to change the size of text. Because the Settings app is one of the apps affected by this, you see the changes in most of the text on the screen as you drag.