# Grid Brush tab reference for the Preferences window

> Customize the default behavior and tools of the tile palette brush.

Explore the settings you can use to customize the behavior of the tile palette brush in the Editor view.

To open the tab, from the main menu select **Edit** > **Preferences**, then select the **2D** tab, then the **Grid Brush** tab. (macOS: **Unity** > **Settings** > **2D** > **Grid Brush**).

## Grid Brush Flood Fill Extents

| **Property**                         | **Description**                                                                                                                                                                                     |
| ------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Show Flood Fill Preview**          | Displays a preview of the fill area when you use the **Flood Fill** tool in the [Tile Palette window](/engine/6000.6/manual/unity2d/tilemaps/create-tile-palette/tile-palette-editor-reference.md). |
| **Flood Fill Preview Fill Extents**  | Limits the size of the flood fill preview. Set this property to 0 to display the full size. This property is available only when you enable **Show Flood Fill Preview**.                            |
| **Flood Fill Preview Erase Extents** | Limits the size of the flood fill preview when you erase tiles. Set this property to 0 to display the full size. This property is available only when you enable **Show Flood Fill Preview**.       |

## Grid Brush Scene View Text

| **Property**                           | **Description**                                                                                                               |
| -------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| **Draw Grid Brush Name in Scene View** | Displays the brush name next to the tile in the **Scene** view.                                                               |
| **Font size for Scene View**           | Sets the font size of the brush name. This property is available only when you enable **Draw Grid Brush Name in Scene View**. |

## Additional resources

* [Tilemaps](/engine/6000.6/manual/unity2d/tilemaps/tilemaps.md)
* [Tile Palette tab reference for the Preferences window](/engine/6000.6/manual/unity2d/tilemaps/reference/tile-palette-preferences.md)