The latest, 29.x, version of Emacs. Whenever I drap&drop an image into a note, it'll open an image in a new buffer. An image won't get embedded or attached onto a note. Why not? Hasn't d&d functionality been added since several versions ago, natively?

How to embed or attach an image onto a note? Preferably, a) by Drap&Drop b) without any third-party package