Better description of the guide on the homepage

ORGWEBPAGE/index.org

@@ -168,13 +168,17 @@ and corresponding to the latest git version.
    - The [[https://launchpad.net/~hexmode/+archive][Ubuntu package]] by Mark A. Hershberger.
 
 * Documentation
-** The Org manual
-   - Read the [[file:manual/index.html][compact guide online]] or as [[file:orgguide.pdf][PDF document]].  The
-     compact guide is a 40 page introduction to Org mode.
-   - Read the [[file:manual/index.html][manual online]].  The manual
-     covers all the bells and whistles in a systematic way. 
+** The Org guide and manual
+   - Read the [[file:manual/index.html][online compact guide]] or download it as a [[file:orgguide.pdf][PDF document]].
+     The compact guide is a 40-page introduction to Org mode.  It
+     covers all features in a basic way and has links to in-depth
+     documentation in the manual and on the web.
+   - Read the [[file:manual/index.html][online manual]].  The manual covers the complete feature
+     set with all the bells and whistles, in a systematic way.  The
+     main structure is identical to the guide, so it is easy to go
+     back and forth between basic and advanced documentation.
    - You can also have the entire manual in a [[file:org.html][single monolithic file]].
-   - Download the manual as a 200 page [[file:org.pdf][PDF document]].
+   - Download the manual as a 200-page [[file:org.pdf][PDF document]].
    - A [[http://hpcgi1.nifty.com/spen/index.cgi?OrgMode%2fManual][Japanese translation]] of the manual (version 4.60), by Takeshi
      Okano.