Go to Settings > Accessibility > Per-App Settings.
2. Tap Add App, then choose an app from the list (or Home Screen & App Library).
3. Tap the name of the app (or Home Screen & App Library) to access its settings.
4. Change 'Bold Test' setting to off
5. Click on the field 'Larger text' and reduce the size
6. Select the size 4 'Four' notches from the left hand side for optimal size.