Applying Scroll Bar (Horizontal & Vertical) to Code Snippets

I like how in some of my code snippets a horizontal scroll bar that is applied for code that is very wide.

I have a post I’m drafting that has a lot of snippets. I’d like to apply a vertical scroll bar for any code snippet longer than 4 rows. Any way to manually do this?

Thanks in advance,

That’s controlled via CSS. By default the scrollbar happens when it’s taller than 500px. You can make it happen early in a theme component as explained in How to make CSS changes on your site.