Inserting Inline Elements in Rich Text Editor

I'm tinkering with the rich text editor today. I figured out how to insert custom block content (ez-pz, top notch! 👍). I see that I can add custom styles to text, but I'm wondering: is it possible to insert inline elements? Like the block-level inserts, but, you know, inline. Like the "dinos in the document" here: https://prosemirror.net/examples/dino/

Hey It’s covered in this article https://medium.com/@kimbjrkman/how-to-use-inline-images-in-rich-text-with-sanity-io-c42594baa509

Awesome, thanks!