SUBSCRIBE{ attributes } - subscribe the current user for notification of changes to the current topic 
Anywhere in a topic or template: 
-  
%SUBSCRIBE{...}% or simply %SUBSCRIBE%               						|  Parameter  | 			 Default  | 			 Meaning  | 		
	     						 who  | 			 Logged-in user  | 			 Who to subscribe (wikiname, no web)  | 		
					 topic  | 			 Current topic  | 			 Topic to subscribe to. Wildcards may be used e.g. topic="Item*" will subscribe to all topics starting with Item. Use topic="Main.*" to subscribe to the WebNotify for the Main web.  | 		
					 unsubscribe  | 			 Not set  | 			 If set to "on", will unsubscribe the user  | 		
	     
 
 
The format of the Subscribe/Unsubscribe button is defined in a template file 
templates/subscribe.tmpl. The normal skin mechanisms can be used to override this with your own local definitions. The default template works with Javascript to provide a smooth interactive experience.

 The 
format  and 
formatunsubscribe parameters have been removed and will
be ignored. The version of PatternSkin shipped with Foswiki 1.1.9 used these
parameters.