You'll probably want to use the Quill Composer, which is our official (in development) WYSIWYG composer.
You should be able to download it from the plugins list.
Don't you use markdown here?
Here's my entry for the plugin contest!!
... wait, what do you mean I don't qualify?
This plugin allows you to embed an Olark chat box into your NodeBB.
Simply register for a new Olark account, paste the Site ID into the plugin settings page, reload, and off you go!
npm install nodebb-plugin-olark
Should have posted this under fake account @Lulian-Jam maybe you could have won!