now is the time for all good men to come to the aid of their country.

Does this work?

Yes this worked, but I had to get the photo location from the add media button and then I couldn’t change the size. I’m going to try another image.

That worked too, but I can’t do that with Flickr or DropBox. I also, as I mentioned, can’t adjust size.

All right. It appears that if I copy the html code, this plugin will convert it to a usable markdown code. On Flickr, you can download the appropriate code for the size. I’m still not sure what the method is for DropBox.

How Dropbox works

Now what I have discovered about DropBox is that even if the picture is not in the public folder, I can upload it to the media library (in WordPress) and alter the size and caption etc. The trick is: Do not use the link.