The Prolog Navigator provides an explorer-like view of a directory
holding Prolog files. Prolog-files can be expanded, showing their
contents. The screen-dump shows a loaded file
bitem.pl containing three XPCE
classes (boxes). Inside class btext_item there is a predicate to_text/3
referencing 4 other predicates.
Menus provide Consult, Edit, access to the Manual and Debugger.