# Options

The Terrain Toolbox includes the following options.

![Terrain Toolbox options](images/4-15-toolbox-options.png)

| **Property**                      | **Description**                                              |
| --------------------------------- | ------------------------------------------------------------ |
| **TerrainData Directory**         | The folder path where you save new Terrain data. The default directory is `Assets/Terrain`. |
| **TerrainData Name Enable Guid**  | Enable the checkbox to add a Guid number to the names of the Terrain and Terrain data file. This ensures that names are unique. Disable the checkbox if you prefer simple naming. |
| **Replace Terrains**              | Enable the checkbox when you keep iterating on the same Terrain. This allows new Terrain to replace the prior Terrain and Terrain data with the same Grouping ID. |
| **Enable Auto Generate Lighting** | Enable the checkbox to automatically bake lighting. This option is unchecked by default. |

## Create

When you are ready to create a Terrain, click the **Create** button. There is an information box above the button that displays basic settings of the new Terrain.

![Create terrain button](images/4-15-toolbox-create-02.png)

The initial part of the creation process runs validations against the Terrain settings, and reports any issues that need to be resolved in order to proceed.