https://leanpub.com/help/manual#leanpub-auto-font-samples

• Body: Clear Sans
• Header: Open Sans
• Code: Anonymous Pro

Image sizes should be 612 pixels wide (@72DPI)

and rendered as

{width=60%}
![](images/whatever/foo.png)

%% Use double percents, after a blank line.

Code is with matching 8 tildas:

{lang="c#", line-numbers=on}
~~~~~~~~
Seriously?!?! Why so hard?
Note the tildas are after defining the language (after a blank line) for the upcoming section
Note that it is not the same syntax as GitHub's 3 backquotes: ``` 
~~~~~~~~

{icon=ban}
{icon=bell-o}
{icon=belt}
{icon=bug}
{icon=code}
{icon=cog}
{icon=comment}
{icon=exclamation}
{icon=eye}
{icon=hand-stop-o}
{icon=lightbulb-o}
{icon=pencil}
{icon=question}
{icon=warning}
G> Tip: use lighbulb-o
G> Info: use info
G> Warning: use warning or bomb
G> Stop: use ban
G> Important: use exclamation
G> Todo: use square-o
G>