MS font size / color issues

Where do you set the font size and color used on text layers?

I tried creating a new slider, and I can’t get the text large enough to be readable on a desktop PC using “Header 1”. I set all the settings the same as another slider from a different site that shows fine. So, I import that slider into my site, and the text is large. There HAS to be a setting somewhere in the MS plugin that controls the font size because if it were anywhere else that imported slider would be small text as well.

On a related note, how do you change the font color? The imported one is white. The default on the two I made are black or gray. None of those work with the background.