# 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](/helmut4-releases/v4.9.1/helmut4-components/helmutfx/users.md) - Projects Action Menu.

### Stream assignment

[Custom\_IO](/helmut4-releases/v4.9.1/helmut4-components/helmutio/streams/io-event-triggers/custom_io.md) and [Custom\_FX](/helmut4-releases/v4.9.1/helmut4-components/helmutfx/streams/fx-event-triggers/custom_fx.md) 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](/files/EjIoMxUHQ2kmMXhBg2Hv)


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