# CUSTOM\_FX

The trigger will activate when a user clicks on the "Action" menu in the Projects window and selects an available stream under "Custom."

For further information refer to [Users](https://docs.helmut.de/helmut4-releases/v4.8.0/helmut4-components/helmutfx/users) - Projects Action Menu.

### Stream assignment

Custom\_IO and [Custom\_FX](https://docs.helmut.de/helmut4-releases/v4.8.0/helmut4-components/helmutfx/streams/fx-event-triggers/custom_fx) streams need to be assigned to groups, as well as being enabled or disabled. 

{% hint style="info" %}
By default, assigning a stream to a new group equals assigning it to all groups.
{% endhint %}

![Group Filter Overlay for CUSTOM\_FX Streams](https://content.gitbook.com/content/cEm1TSe9cbcIGVFLrAGo/blobs/GUeRDxqusGqjXRfvx1VA/image.png)