Another way to do it is to use spaces instead of tabs. Typically, when I write a long article, a separation between paragraphs serves as a better organizational tool than does an indent. While indents lend themselves to physical media, which have a limited amount of area to work with, electronic media has an infinite amount of space, and that advantage can be utilized by simply adding a blank space between paragraphs.
For the record, I only talked so much about that because I wanted this comment to be a reasonably decent example of what I meant, and without being ridiculously wordy, I couldn't think of a way to extend this comment to a length that I could do so. But I think I've achieved my purpose... so good luck with your questions. Incidentally, specifiying an external URL will simply place a link at the bottom of your article. That way, if what you're saying is a direct quote from a magazine, or you want to direct people to the site where you got facts or pictures, you can plug the site into the external URL box and you'll have a URL in a standardized format without all the work of putting in the URL yourself. Good idea, eh? I thought so.
Once again, best of luck,
Dan