Adding an external font to Brine format

So in the brine template there are 3 heading options all of which i have populated with external fonts with some custom css, but I wanted to add a fourth heading style that also uses an external font. On other squarespace templates they have four headings and so I can use the same code i have been using for the 3 headings. However in the brine format when I am editing a text box there are only H1,H2,H3 and body text options. Can anyone help?

You create text & use h1, h3, h3, body.. then share link. I can check to see which code brine used.

I'm not sure if this is what you meant, i have been using squarespace for 2 days so please forgive me but in the image i have sent i only have the option for fonts h1, h2 ,h3 ,body and code, in was looking to add a h4 option, can that be done?

17 hours ago, WillBeazer said:

I'm not sure if this is what you meant, i have been using squarespace for 2 days so please forgive me but in the image i have sent i only have the option for fonts h1, h2 ,h3 ,body and code, in was looking to add a h4 option, can that be done?

You can use Markdown Block

eg

# here is h1

## here is h2

#### heare is h4