How do I format title slide text?

Good morning!

I’m working on my client’s site, esgsimplicity.com. It was handed over from a designer who worked on it a few months back and who isn’t available to help me. I changed the title slide text on the homepage. It looks like this on the site (no formatting, it’s clearly just run over the line):

Your Partner in Energy
Efficiency

Before, it looked like this (obviously formatted):

Your Energy Efficiency
Collaboration
Platform.

I can’t figure out how to format the text so that takes up more than one line purposefully. I would like the new text to look like this:

Your Partner In
Energy Efficiency

How do I format the text to look like that?

Thanks!