SQl Mode - UDMs pretty much are the mechanism for making horses with user defined attributes stick out on Html Reports.
Playlist File Mode - UDMs are the primary way to make horses with user defined attributes stick out on Html Reports.
In Playlist File Mode you also have the ability to set Overlay Highlighting on the User Sys Defs Screen. Here you are highlighting JPR(1) and CPace(1) horses when MLOR3 is greater than or equal to a user defined point.