Reduce font size on "Store"

Site URL: https://boyopress.com/store

I am trying to reduce the font size on the word "Store" but can't seem to do it through normal Design ---> Font panel. Does this require special code injection? 

Hi, it's a h2 so should be tweakable under design > site styles > fonts > headings > h2

Although that would alter all h2's site wide or you could add the below to design > custom css to alter just the 'Store' heading:

#collection-600670a29db7573b5dfb7dcb h2 {
    font-size: 3.5rem
}

2 hours ago, ErikaT said:

Hi, it's a h2 so should be tweakable under design > site styles > fonts > headings > h2

Although that would alter all h2's site wide or you could add the below to design > custom css to alter just the 'Store' heading:

#collection-600670a29db7573b5dfb7dcb h2 {
    font-size: 3.5rem
}

It worked by adjusting h2.  Thanks for your help!