# Introduction to Legacy Animation system

> Understand how to work with Unity's Legacy Animation system.

Unity's Legacy animation system (Legacy) has a limited feature set that predates Mecanim. Legacy is still available because it is easier to use and provides better performance for simpler animations.

Legacy is also available for backwards compatibility with old Unity projects. Legacy uses the [Animation component](/engine/6000.3/manual/animation-section/animation-legacy/class-animation.md) and the special **Legacy** import option.

## Working with Legacy Animations

To import a Legacy Animation, select **Legacy** as the **Animation Type** in the [Rig tab of the Import Settings window](/engine/6000.3/manual/assets-and-media/asset-types/models/importing/fbximporter-rig.md):


**Rig tab on the Import Settings window:**
![](/api/media?file=/engine/6000.3/media/images/Rig-3.png)

Make sure you enable the **Import Animation** option on the [Animation tab](/engine/6000.3/manual/assets-and-media/asset-types/models/importing/class-animation-clip.md).