# Subscribe to CMS collection page changes

> Update: New Designer API event subscription for tracking CMS collection page interactions and item selections.

The Designer API now includes a new event subscription method for CMS collection pages:

* **[Subscribe to CMS Collection Page Events](/designer/reference/user-changes-cms-page)** <br />
  Track when users interact with CMS collection pages and items. This event triggers in two scenarios:
  * When a user navigates to a collection page
  * When a user selects a different CMS item within a collection page

<Note>
  This event subscription works with both CMS and Ecommerce collection pages.
</Note>