Probably, we should convert the manual to HTML and use a web
browser, instead of using yelp.
What about a additional help menu item "Reference Manual on the web" which points to http://www.gnu.org/software/pspp/manual/html_node/index.html ? This could give the time to think more about the help system. Context sensitive help would certainly be an improvement. SPSS has a nice way to handle this. Maybe somebody knows an opensource program for it??