I currently have Captivating and would like to move to another theme. How do I keep the h2 tags consistent with a new theme?

Captivating is the only theme we have that has custom H2 tags the first time you use one within a blog post.  If you want to switch themes, this code isn't in our other themes, so that very first H2 tag will look like any H2 tag which could be quite large.  

If you'd like to keep these H2 tags without having to redo them across your site, you can copy the following CSS and paste it under Appearance > Customize > Additonal CSS and that will fix it for you!