Dividers (horizontal rules) are a great way to signify to your readers that you are shifting your focus to a different point or topic. Here's how to add them into your stories.
Step 1. Open a story in the editor and go to a new line. You will now see the embedder bar appear.
Step 2. Click on the – icon to embed the divider on that line.
As this is just a simple <hr> tag, it should display correctly on all websites you publish your story to.