Hi France, 

While you can’t manually specify the amount of lines that are on a button, it will automatically drop to a new line if the text is long enough. With that being said, you’re generally going to want the text on your buttons to be fairly minimal (ex. Buy Now, Learn More, Signup Today). Can you give me a bit more information about what your button text is? For example, is this a CTA button? I’d love to hear exactly what you’re trying to do here.