Basically, the codes you've already seen on over at Button/Menu label, description, tags and sequences can be used in columns now. In case of an evaluator column, check "Support markup" and have it show something like
return "<#ffffff><b>" + name + "<kbd>" + name + "</kbd> <%error> <%bulb:3>"
I did find a bunch more codes that can be used (any hex editor will help here) but since everything is basically unsupported/undocumented AFAIK, I would prefer GPSoftware themselves to publish further information on this.