#help_index "Topic/SubTopic;OtherTopic" The help index preprocessor compiler directive sets the topics for syms subsequently defined. You specify subtopics with a '/' tree hierarchy and separate multiple topics with a ';'. The index ctrls HI:index links. public causes a sym to appear in help_index reports. #help_file "filename[.DD.Z]" The help file preprocessor directive makes a file into the heading of a HI:index report for the current help index.