Secondary Textures tab reference for the Sprite Editor window

Explore the properties you use to add secondary textures to a sprite texture, for example normal maps or lighting mask maps. For more information, refer to Add a normal map or a mask map to a sprite in URP.

Toolbar

The following properties appear in all the different tabs of the Sprite Editor window.

Property	Icon	Description
Window name	N/A	Sets the tab to display in the Sprite Editor window. The options are: Sprite Editor: Displays the Sprite Editor tab. Custom Outline: Displays the Custom Outline tab. Custom Physics Outline: Displays the Custom Physics Outline tab. Secondary Textures: Displays the Secondary Textures tab. Skinning Editor: Displays the Skinning Editor tab. For more information, refer to the 2D Animation package documentation.
Preview		Previews your changes in the Scene view.
Revert	N/A	Discards your changes.
Apply	N/A	Saves your changes.
Color		Toggles between displaying the color channels of the texture and its alpha channel.
Zoom	N/A	Sets the zoom level at which to display the texture.
Mipmap level		Sets the mipmap level of the texture to display. The slider ranges from the lowest resolution mipmap level on the left to the highest resolution mipmap level on the right. This property is available only if the texture has mipmap levels.

Main area

The main area of the Sprite Editor window displays the texture. Each individual sprite in the texture displays as a white outline, also known as a SpriteRect.

Left-click a sprite to select it.

A detail from the Sprite Editor with a rock environment texture, sliced into four sprites. One sprite is selected.

Unity displays the following:

A: The sprite area as a blue outline with filled circular handles.
B: The border as a green outline with filled square handles.
C: The pivot point as a hollow blue circle.

To display a secondary texture in the Sprite Editor window, select it in the Secondary Textures overlay. To display the sprite texture again, select anywhere outside of the overlay.

Secondary Textures overlay

Property	Description
Add (+)	Adds a secondary texture. The maximum number of secondary textures is 8.
Remove (-)	Removes a secondary texture. Select a secondary texture to highlight it, then select Remove.
Name	Sets the name of the secondary texture. To add a normal map or a lighting mask map, select _NormalMap or _MaskTex from the dropdown. Note: The dropdown might include names used by Unity packages you installed, even if you have since uninstalled the packages. For more information about adding a normal map of a lighting mask map, refer to Add a normal map or a mask map to a sprite in URP.
Texture	Sets the texture to use as the secondary texture. Drag a texture from the Project window, or select the picker (⊙). To save the texture, select Apply in the toolbar.

Additional resources

Custom Physics Outline tab reference for the Sprite Editor window

2D Profiler module reference