> For the complete documentation index, see [llms.txt](https://docs.helmut.de/helmut4-releases/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.helmut.de/helmut4-releases/v4.7.2/helmut4-components/helmutfx/streams/fx-event-triggers/custom_fx.md).

# 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/v4.7.2/helmut4-components/helmutfx/users.md) - Projects Action Menu.

### Stream assignment

Custom\_IO and [Custom\_FX](/helmut4-releases/v4.7.2/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)