Portfolio page subheading

Site URL: https://puma-orb-9lss.squarespace.com/projects

Is it possible to have a sub-headings on the portfolio page?

I searched all over the forum but I couldn't find anything on it. Except for this one. 

On 9/18/2020 at 6:59 PM, tuanphan said:

Edit Portfolio title to this

Title line 01<span>line 02</span>

then add this code to Home > design > Custom CSS

h3.portfolio-title span {
    display: block;
    font-size: 18px;
}

 

This is great thanks!

However it only works with (h3). Just curious as to why I can't change it to h2 for example. Trying to understand the code too hah.

You mean change span to h2?

It will generate an invalid structure