When a text section is displayed, you can select a new topic by
pointing to a word and clicking the left mouse button. That word will
then be highlighted. If you click again on the highlighted word
then it is sent to Prolog via
help/1. It is the same as entering
the topic through
index... dialogue in the Goto pulldown menu.
A recognized topic is a word in the form of [A-Z a-z][A-Z a-z 0-9_-]*
possibly followed by a slash preceding an arity specification such as
/[1,2]. Words consisting of non-alphanumeric characters
@> will not be recognized.