I use the ___ (three dashes for line)

For quote, I use > before the quoted text

I use this markdown to pull images to right, to pull to left simply change the right to left. <div class="pull-right"><center><img src="http://i.imgur.com/ow7sHn0.jpg" /><br/><em>Credit: Steemit</em></center></div>

Thanks a lot.