After some tests, I discovered that it's pretty hard for a user to find all the documentation about WYSIWYG and its options. For example, when a user accesses WYSIWYG Editor from Administration he sees fields in which he need to put some plugins (But, the question is, where can he find all plugins?).
My idea is, to add in the right, under the “XWiki Syntax Help” a new panel called “WYSIWYG Editor Help”.
In that panel it will be integrated (like on the XWiki Syntax Help) the text “Help on the WYSIWIG Editor” with a link to http://platform.xwiki.org/xwiki/bin/view/AdminGuide/WysiwygEditor. In that way, the user will discover more faster all the WYSIWYG options.