SHOWPREFERENCE -- show where preferences are defined. 
Preference values are shown in a bulleted list, together with where they were defined.
  Parameters 
             
	
		
			| Parameter | Description | Default: | 
	     
	
		
			| "name,name,name" | Comma-separated list of preferences to show |  | 
	     
  Examples 
 
-  %SHOWPREFERENCE%will show all preferences
-  %SHOWPREFERENCE{"ATTACHFILESIZELIMIT"}%expands to
   * Set ATTACHFILESIZELIMIT = ""
      * ATTACHFILESIZELIMIT was *finalised* in Main.SitePreferences
 
-  %SHOWPREFERENCE{"DENYWEBCHANGE,ALLOWWEBCHANGE"}%expands to
   * Set DENYWEBCHANGE = ""
   * Set ALLOWWEBCHANGE = "%USERSWEB%.AdminGroup"
      * ALLOWWEBCHANGE was defined in System.WebPreferences