How do you change the font?

On an iPhone, you can change the text size, however you cannot change the font.

To change the text size, open Settings ➡️ Accessibility ➡️ Display & Text Size: Here, you can select the general text on your iPhone to be BOLD or LARGER TEXT set to ON.

This action will make the text changes universally and the setting will apply to those apps that use it.

Axel F.

Where exactly? What app? Please provide specifics about what you want to change. A screenshot would be helpful.

The font used in the iphone menus and dialogues cannot be changed.