Sorry, I figured it out. This is my first website on Squarespace. I had made the assumption that since I couldn't edit content in mobile view that I also couldn't rearrange elements. On my hero, the h1 goes to the bottom of the section content while h3 jumps to the top. Also, on my content pages various full-width text boxes, buttons and images are completely out of order in mobile. Till now I've been developing from scratch and done customized responsive design for various viewports. It's a little frustrating to not be able to change font sizes on one but not the other in Squarespace, and there doesn't seem to be a rhyme or reason as to how content is arranged by default in mobile.