How do you add pictures to Dreamwidth posts?

[eledonecirrhosa]

I've utterly failed to find an answer to this in the Dreamwidth help. How do I upload a photo to a blog entry? The HTML option only offers "insert image" which lets me specify a URL, but doesn't offer the option of uploading a photo from my computer.

The Rich Text option has a little arrow to expand/collapse a menu... but that does precisely nothing. No menu ever appears!

Any clues on how to resolve either of these issues?