Roll20 Wiki said: You can use basic Markdown syntax in your text chat messages. We
don't support the entire breadth of everything Markdown can do (like
headers), but rather just basic formatting. Here's a quick rundown:
Format
Syntax
Bold Text
**text to bold**
Italicize Text
*text to italicize*
Link to URL
[Google]( <a href="http://www.google.com" rel="nofollow">http://www.google.com</a> )
Image
[Roll20 Logo]( <a href="http://roll20.net/assets/themes/roll20/images/new-logo-white-sm.png" rel="nofollow">http://roll20.net/assets/themes/roll20/images/new-logo-white-sm.png</a> )
Note: Including an image is just putting in a link to an image. If
the link ends in ".png", ".jpg", ".jpeg", or ".gif", we will
automatically insert an image tag in addition to linking to the source
image.
You can use the Markdown formatting in general messages, whispers
(/w), descriptions (/desc), and emotes (/em). You can also include
Markdown formatting in the values you pass to Roll Templates and it should work fine. For example, {{attack= 1d20 vs **AC**}}.
