Maybe I’m too “old fashioned,” but I’ve often wished I had a button on my WordPress editor that I could use to easily add a good-ol’ <hr>.
There are some other options that users may want, too. The stand-by plugin solution for this is the TinyMCE Advanced. It adds a number of extra features along with additional editor buttons — including my <hr>.
The problem I found with this particular plugin is similar to others. It comes with junk I don’t want or need, sometimes conflicts with WordPress’ native behavior, and plugin bloat is never a good thing!
Here’s how you can manually add only the additional editor buttons you want.