rendering.md in active_model_serializers-0.10.6

- old
+ new

@@ -201,11 +201,11 @@
 
 ### serializer_opts
 
 #### include
 
-PR please :)
+See [Adapters: Include Option](/docs/general/adapters.md#include-option).
 
 #### Overriding the root key
 
 Overriding the resource root only applies when using the JSON adapter.
 
@@ -258,18 +258,32 @@
 Note that by using a string and symbol, Ruby will assume the namespace is defined at the top level.
 
 
 #### serializer
 
-PR please :)
+Specify which serializer to use if you want to use a serializer other than the default.
 
+For a single resource:
+
+```ruby
+@post = Post.first
+render json: @post, serializer: SpecialPostSerializer
+```
+
+To specify which serializer to use on individual items in a collection (i.e., an `index` action), use `each_serializer`:
+
+```ruby
+@posts = Post.all
+render json: @posts, each_serializer: SpecialPostSerializer
+```
+
 #### scope
 
-PR please :)
+See [Serializers: Scope](/docs/general/serializers.md#scope).
 
 #### scope_name
 
-PR please :)
+See [Serializers: Scope](/docs/general/serializers.md#scope).
 
 ## Using a serializer without `render`
 
 See [Usage outside of a controller](../howto/outside_controller_use.md#serializing-before-controller-render).
 