Inserting Images
You can copy & paste directly from the clipboard (easiest). Or if want to link to an external image, use <img style="width: 67px;" src="URL"> - you can update the width (ie. 67px) and you must use a publicly available URL (where the image exists).
Example:
This is the html I used:
<img style="width: 400px;" src="https://m.media-amazon.com/images/I/914GemRhCEL._SL1500_.jpg">
You can experiment with more HTML ... here's an example where the image (a GIF) is centered:
<p align="center"><img src="https://cdn.pubwriter.com/files/img/gif/5seconds.gif" width="250" /></p>
Just use the Preview tab to check it before you hit create.
~ Brian