How do I increase/change the size of the headings? – Shopify Ninjas

To update the size of the headings in your theme, you can adjust the CSS as follows.

1. Open up Admin > Themes > Template Editor. Under "Assets", find the file called "customise.css".

2. Add the code below to the very bottom of that file, and adjust as needed:

h1 { font-size: 38px; }

***

Change the '38' to whatever size you'd like the biggest headings to be. For example, to change it to 30px, change to:

h1 { font-size: 30px; }

Done.