diff --git a/content/docs/customization.md b/content/docs/customization.md
index 446cf38..bb950ad 100644
--- a/content/docs/customization.md
+++ b/content/docs/customization.md
@@ -76,7 +76,7 @@ Registers a template for a folder collection or an individual file in a file col
* name: The name of the collection (or file for file collections) which this preview component will be used for.
* Folder collections: Use the name of the collection
* File collections: Use the name of the file
-* react_component: A React component that renders the collection data. Six props will be passed to your component during render:
+* react_component: A React component that renders the collection data. Seven props will be passed to your component during render:
* entry: Immutable collection containing the entry data.
* widgetFor: Returns the appropriate widget preview component for a given field.
* [widgetsFor](#lists-and-objects): Returns an array of objects with widgets and associated field data. For use with list and object type entries.
@@ -102,6 +102,29 @@ Registers a template for a folder collection or an individual file in a file col
CMS.registerPreviewTemplate("posts", PostPreview);
```
+ * getCollection: Returns a promise that resolves with the entries in a collection
+ **Params:**
+ * collection: The name of the collection - required
+ * slug: The slug of the entry - optional: if not supplied all entries will be returned
+
+ **Example:**
+ ```html
+
+
* document: The preview pane iframe's [document instance](https://github.com/ryanseddon/react-frame-component/tree/9f8f06e1d3fc40da7122f0a57c62f7dec306e6cb#accessing-the-iframes-window-and-document).
* window: The preview pane iframe's [window instance](https://github.com/ryanseddon/react-frame-component/tree/9f8f06e1d3fc40da7122f0a57c62f7dec306e6cb#accessing-the-iframes-window-and-document).