Clarify #822

docs/Reference.md

@@ -476,8 +476,9 @@ The following options are available when adding a route:
                 - `user` - the authentication must be on behalf of a user.
                 - `app` - the authentication must be on behalf of an application.
 <p></p>
-    - `jsonp` - enables JSONP support by setting the value to the function name of the callback method. For example, if the value is `'callback'` and
-      the JSON response is `'{ "a":"b" }'`, the payload will be: `'callback({ "a":"b" });'`
+    - `jsonp` - enables JSONP support by setting the value to the query parameter name containing the function name used to wrap the response payload.
+      For example, if the value is `'callback'`, a request comes in with `'callback=me'`, and the JSON response is `'{ "a":"b" }'`, the payload will be:
+      `'me({ "a":"b" });'`.
 <p></p>
     - `description` - route description used for generating documentation (string).
     - `notes` - route notes used for generating documentation (string or array of strings).