README.md in graphql-preview-0.0.6 vs README.md in graphql-preview-0.0.7

@@ -46,26 +46,37 @@
   # You can have more than one of these!
   updated_on Date.new(2017, 11, 3), url: "http://example.com"
 
   # The parts of your GraphQL schema you want toggled by this preview
   toggled_on [
-    Library::Author, # an object
-    Library::ExtraInfo, # an interface,
-    Library::Author.fields["socialSecurityNumber"], # a field
-    Library::Book.fields["author"].arguments["includeMiddleInitial"], # an argument
-    Library::Likeable, # a union,
-    Library::Cover, # an enum
-    Library::Cover.values["DIGITAL"], # an enum value
-    Library::BookOrder, # an input object
-    Library::AddLike, # a mutation
+    "Author", # an object
+    "ExtraInfo", # an interface,
+    "Author.socialSecurityNumber", # a field
+    "Book.author.includeMiddleInitial", # an argument
+    "Likeable", # a union,
+    "Cover", # an enum
+    "Cover.DIGITAL", # an enum value
+    "BookOrder", # an input object
+    "Mutation.addLike", # a mutation
   ]
 end
 ```
 
 ### Toggling the preview on your schema
 
 This gem introduces a new method to apply on your schema, `enabled_previews`. It takes an array,
 and you should pass in the list of preview classes you want enabled on your schema. For example:
+
+``` ruby
+class Schema < GraphQL::Schema
+  query(query_type)
+  enabled_previews [
+    TestPreview
+  ]
+end
+```
+
+If you are using `graphql-ruby`'s `.define` DSL a similar API is provided:
 
 ``` ruby
 GraphQL::Schema.define do
   query(query_type)
   enabled_previews [