Add custom border to title tags in post

There is no graphic

Make a child theme and then in the CSS file, use,

.post .post_title {
 border-top: 1px solid #C5DDD8;
}

.post_title h2{
 margin-top: 3px;
 border-top: 1px solid #C5DDD8;
}

How do you make a child theme?

Also, it is on the h2 and h3 tags as well in the post.

How do you make a child theme?

https://codex.www.ads-software.com/Child_Themes

Also, it is on the h2 and h3 tags as well in the post

I don’t see this, where are you looking and which website?

On https://www.listverse.com, go to a post and you will see each numbered section has borders. Got you on the child theme. Thanks!

Okay but those numbers aren’t <h3> elements, I would first add these numbers to your theme before styling the border.