If the browser is accessed from localhost, each object 
that is related to a known source-location has an edit icon at the right 
side. Clicking this calls edit/1 
on the object, calling the user's default editor in the file. To use the 
built-in PceEmacs editor, either set the Prolog flag editor 
to pce_emacs or run ?- emacs. before clicking 
an edit button.
Prolog source-files have a reload button attached. Clicking this reloads the source file if it was modified and refreshes the page. This supports a comfortable edit-view loop to maintain the source-code documentation.