Thanks for pointing these out, hs2. Note that currently there is help for Aliases in two locations in the docs: Edit > Alias Facility, and Options > Aliases - each with different information. We plan to fix this and improve and expand the help for the Alias feature.
Here are some others that I don't think aren't currently documented that you may find useful!
%\o Current function name with signature
%\f Insert the current file name
%\m <macro> <arg>% -- Call Slick-C macro with optional argument "arg"
- Lisa