diff --git a/developer_manual/app_development/intro.rst b/developer_manual/app_development/intro.rst
index 6f034836e..b69f6125a 100644
--- a/developer_manual/app_development/intro.rst
+++ b/developer_manual/app_development/intro.rst
@@ -13,6 +13,17 @@ After :doc:`you've set up the development environment <../getting_started/devenv
 
 Then create a skeleton app in the `app store <https://apps.nextcloud.com/developer/apps/generate>`_. This doesn't publish anything on the appstore yet, it just gives you a download.
 
+Edit an existing app
+--------------------
+
+Alternatively, if you would like to contribute to an existing app instead of creating a new one, first :doc:`set up the development environment <../getting_started/devenv>`, then change into the Nextcloud apps directory::
+
+    cd /var/www/nextcloud/apps
+    
+Finally, clone the app to which you would like to contribute. For example:
+
+    git clone https://github.com/nextcloud/cookbook.git 
+
 Enable the app
 --------------
 The app can now be enabled on the Nextcloud apps page.