HTML
From GeoWiki
Geocaching Australia Cache Listings and Logs use HTML (Hypertext Markup Language), the same stuff webpages are made of. To get your post to display properly, with line breaks, you will need to know one or two markup codes:
<br> will insert a line break. Like pressing "Enter" to go to a new line.
<p> will start a new paragraph. Like pressing "Enter" twice!
Now things get a little bit tricker:
<img src=http://yourimagelink> will insert a picture. Copy and paste the code into your log, then copy the link to your image and paste it over the "http://yourimagelink" part. Don't use an image bigger than 640x480, it's too wide and messes up the screen!
A couple of other codes:
<b>bold</b>
<i>italic</i>