---
title: "Set Driven Keys"
url: "https://help.maxon.net/c4d/en-us/Content/html/5832.html"
section_path: "XPresso > Set Driven Keys"
description: "Set driven keys provide an easy way to create object interactions without using the XPresso Editor directly."
---

# Set Driven Keys

Set driven keys provide an easy way to create object interactions without using the XPresso Editor directly.

A set driven key is a relationship where one parameter controls another. For example, suppose you want a door to open and close automatically as a character enters a room. The character's position can be used to control whether the door is open or closed. The object parameter that does the controlling is the **driver**. The parameter that is being controlled is **driven**. Almost any kind of set-driven relationship is possible, making it easy to manage complex motions or objects.

# To create a set driven key:

Decide which parameter is the driver and which parameter is driven (the driver controls the driven parameter).

Set the driver as follows:

- In the **Object Manager**, select the object of the parameter that you want to act as the driver.
- From the context menu, choose XPressions / Set Driver to define the parameter as the driver.

# Set the driven parameter as follows:

- In the **Object Manager**, select the object of the parameter that you want to be driven.
- In the **Attribute Manager**, right-click (Windows) or Command-click (macOS) the name of the parameter that you want to be driven to open its context menu.
- From the context menu, choose XPressions / Set Driven (Absolute) to define the parameter as driven. An XPresso tag is added to the driven object in the **Object Manager** and the driver now controls the driven parameter.
- In the **Attribute Manager**, right-click (Windows) or Command-click (macOS) the name of the parameter that you want to act as the driver to open its context menu.

# Relative Driven Keys

There is a second variation of set driven keys: Relative driven keys. These allow values to be set directly or with a range mapper node that is created automatically. In both cases the **Input Upper, Input Lower, Output Upper** and **Output Lower** parameters are adjusted accordingly.

To create a relative set driven key:

- Use the same procedure as for normal set driven keys (see above), except choose Animation / Set Driven (Relative) instead of **Animation / Set Driven** (Absolute) when you set the driven parameter. Once you have created the set driven key, edit the Range Mapper's values as desired.