> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/controls/events/plane-changed.md).

# Plane Changed

This event is triggered when the plane of the current form changes.

{% hint style="info" %}
Actions that change the current plane like **GotoPlane** or **NextPlane** trigger this event.
{% endhint %}

{% hint style="info" %}
When the form opens in a plane different from plane 0 by calling **ShowForm** and specifying a different plane this event is triggered after the **OpenForm** event and before the **AfterOpenForm**event. But if there is code in the "Open Form" event, and that code changes the current plane, then the event is executed by the call that changed the plane, and will not be executed again after the **OpenForm** event.
{% endhint %}

#### Event available on the following operating systems

![](/files/-MGIiDGuNcrVFP-DbUma)