Whether you're posting on Reddit, Discord, or Github, there's only one way to add formatting: Markdown. Markdown has just a few rules for formatting text the way you want, and you only need to learn the rules for the formatting you actually use. Let's go over the simple rules, talk about why Markdown is useful, then take a look at a few resources you can use to go further with Markdown. If you're using Markdown to write entire documents, though, you're going to need a few document-specific tools. This doesn't happen while writing in Markdown because you can clearly see where all the formatting begins and ends.