diff --git a/docs/extras/array.md b/docs/extras/array.md
index ce2828d61..4ee209ecc 100644
--- a/docs/extras/array.md
+++ b/docs/extras/array.md
@@ -11,6 +11,12 @@ That means that you can paginate the array independently from any other kind of
 
 See [extras](../extras.md) for general usage info.
 
+In the `pagy.rb` initializer:
+
+```ruby
+require 'pagy/extras/array'
+```
+
 In a controller:
 
 ```ruby
diff --git a/docs/extras/bulma.md b/docs/extras/bulma.md
index 319681767..2f38899e7 100644
--- a/docs/extras/bulma.md
+++ b/docs/extras/bulma.md
@@ -9,6 +9,12 @@ This extra adds nav helper and templates for the Bulma CSS [pagination component
 
 See [extras](../extras.md) for general usage info.
 
+In the `pagy.rb` initializer:
+
+```ruby
+require 'pagy/extras/bulma'
+```
+
 Render the navigation links in some view...
 with a fast helper:
 
diff --git a/docs/extras/elasticsearch_rails.md b/docs/extras/elasticsearch_rails.md
index 243967e32..c95120a1b 100644
--- a/docs/extras/elasticsearch_rails.md
+++ b/docs/extras/elasticsearch_rails.md
@@ -9,6 +9,12 @@ Paginate `ElasticsearchRails::Results` objects efficiently avoiding expensive ob
 
 See [extras](../extras.md) for general usage info.
 
+In the `pagy.rb` initializer:
+
+```ruby
+require 'pagy/extras/elasticsearch_rails'
+```
+
 In a controller:
 
 ```ruby
diff --git a/docs/extras/foundation.md b/docs/extras/foundation.md
index 4f5baf041..4076a8a4c 100644
--- a/docs/extras/foundation.md
+++ b/docs/extras/foundation.md
@@ -9,6 +9,12 @@ This extra adds nav helper and templates for the Foundation [pagination componen
 
 See [extras](../extras.md) for general usage info.
 
+In the `pagy.rb` initializer:
+
+```ruby
+require 'pagy/extras/foundation'
+```
+
 Render the navigation links in some view...
 with a fast helper:
 
diff --git a/docs/extras/materialize.md b/docs/extras/materialize.md
index 8233c7f0d..34cf6610c 100644
--- a/docs/extras/materialize.md
+++ b/docs/extras/materialize.md
@@ -9,6 +9,12 @@ This extra adds nav helpers for the Materialize CSS [pagination component](https
 
 See [extras](../extras.md) for general usage info.
 
+In the `pagy.rb` initializer:
+
+```ruby
+require 'pagy/extras/materialize'
+```
+
 Render the navigation links in some view...
 with a fast helper:
 
diff --git a/docs/extras/searchkick.md b/docs/extras/searchkick.md
index a60ff1136..978560a0f 100644
--- a/docs/extras/searchkick.md
+++ b/docs/extras/searchkick.md
@@ -11,6 +11,12 @@ The `Searchkick::Results` object has already done pagination calculations, we ju
 
 See [extras](../extras.md) for general usage info.
 
+In the `pagy.rb` initializer:
+
+```ruby
+require 'pagy/extras/searchkick'
+```
+
 In a controller:
 
 ```ruby
diff --git a/docs/extras/trim.md b/docs/extras/trim.md
index fe9c6a806..040e8642d 100644
--- a/docs/extras/trim.md
+++ b/docs/extras/trim.md
@@ -11,8 +11,9 @@ This extra is needed only for very specific scenarios, for example if you need t
 
 See [extras](../extras.md) for general usage info.
 
+In the `pagy.rb` initializer:
+
 ```ruby
-# in the Pagy initializer
 require 'pagy/extras/trim'
 ```