How do I enable bold, italic, and underline in iMessage on iPhone?

Hello thys228, and welcome to the Apple Support Community.

You can format text directly in the Messages app.

Try these steps:

1. Open Messages and start typing your message.
2. Select the text you want to format.
3. Tap the formatting option when available and choose the style you want, such as Bold, Italic, or Underline.

You can also use other text effects available in Messages depending on your iOS version.

Useful links:

Use message effects with iMessage on your iPhone and iPad - Apple Support

How to use a pointer device with AssistiveTouch on your iPhone, iPad, or iPod touch - Apple Support

Please let us know if this helps you format your messages.

Your feedback may help other Apple Support Community users with the same question.

🙏🏻

Have a nice day.

And one more thing…

Never forget to think different.

