> For the complete documentation index, see [llms.txt](https://docs.incari.com/incari-studio/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.incari.com/incari-studio/2021.4/toolbox/events/object/on-alpha-change.md).

# On Alpha Change

## Overview

![The On Alpha Change Node.](/files/7CoKh12cE1369HSjPOuE)

**On Alpha Change** is an **Event Listener** **Node** used for executing a **Logic Branch** when the **Alpha** value of an **Object** changes.

## Attributes

| Attribute | Type         | Description                                                                            |
| --------- | ------------ | -------------------------------------------------------------------------------------- |
| `Object`  | **ObjectID** | The **Object** in which a change of the **Alpha** value triggers the **Logic Branch**. |

## Outputs

| Output             | Type      | Description                                                                                                                            |
| ------------------ | --------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| *Pulse Output* (►) | **Pulse** | A standard **Output Pulse**, to move onto the next **Node** along the **Logic Branch**, once this **Node** has finished its execution. |
| `Alpha`            | **Float** | The modified **Alpha** value.                                                                                                          |

## See Also

* [**Events**](/incari-studio/2021.4/toolbox/events.md)
* [**Object**](/incari-studio/2021.4/toolbox/events/object.md)
* [**Alpha**](/incari-studio/2021.4/getting-started/attributes/common-attributes/sprite.md#alpha)