Gmail – Embed image inside Gmail message, not as an attachment

The way I do this is to click the Forward option and then type in a new Subject and clear the message text so I have an new message but with the attachments in place.

I'd be surprised if there's a quicker way than this; entering a new Subject doesn't take that long.

Very late answer, but I happen to use this all the time.

On windows, super simple. Save the message with extension .b64 and open it in for example winzip. Now you can view the content of the message in internal viewer or extract it

In gMail you can "view original" to get at just the b64 part