diff --git a/src/connections/destinations/catalog/actions-mixpanel/index.md b/src/connections/destinations/catalog/actions-mixpanel/index.md
index 3011da4294..858ccf04b8 100644
--- a/src/connections/destinations/catalog/actions-mixpanel/index.md
+++ b/src/connections/destinations/catalog/actions-mixpanel/index.md
@@ -135,3 +135,8 @@ If you want to confirm, you can configure the new destination to point to a diff
 
 If the Mixpanel (Actions) destination uses $group_id as the group key, ensure that the mappings handling your `track` events have the field for **Group ID** mapped to a valid value. By default, this field maps to the event variable `context.groupId`.
 
+To send Track events with a custom Group Key, include the key as a property of Track events. For example:
+```js
+analytics.track('Example Event', { custom_group_key : 'group1' });
+```
+