If you follow the steps in Section Quick Start, above, you can skip this section.
It is possible to look up the documentation for any built-in or
library predicate from within Emacs (using C-c ? or the
menu). For this to work Emacs must be told about the location of the
info-files that make up the documentation.
   
The default location for the info-files are
<prefix>/lib/sicstus-3.11.0/doc/info/ on UNIX platforms and
C:/Program Files/SICStus Prolog 3.11.0/doc/info/ under Windows.
   
Add the following to your ~/.emacs file, assuming INFO is the
path to the info files, e.g. C:/Program Files/SICStus Prolog 3.11.0/doc/info/
     (setq Info-default-directory-list
        (append Info-default-directory-list '("INFO")))
     
    for GNU Emacs, or
     (setq Info-directory-list
        (append Info-directory-list '("INFO")))
     
for XEmacs. You can also use M-x customize-group <RET> info <RET> if your Emacs is new enough. You may have to quit and restart Emacs for these changes to take effect.