When using USS, you can specify values for built-in
VisualElement properties or for custom properties in your UI(User Interface) Allows a user to interact with your application. More info
See in Glossary code.
In addition of reading their values from USS files, built-in property values can be assigned to in C#, using the C# properties of
VisualElement. Values assigned in C# override values from a Unity style sheet (USS).
You can extend USS with the Custom Properties API. Custom Properties require the
This section lists the supported types.
UIElements only supports the pixelThe smallest unit in a computer image. Pixel size depends on your screen resolution. Pixel lighting is calculated at every screen pixel. More info
See in Glossary (
px) unit of measurement. If a unit of measurement is not specified, UIElements assumes that the property type is expressed in pixels. However, in future versions, when additional units are supported, the unit of measurement will be required. To avoid future compatibility issues, it is recommended that you specify
px as the unit of measurement.
For example, a width of two hundred pixels should be expressed as
width:200px;. Note that
0 is a special value that doesn’t require a unit of messurement.
Numeric values are expressed as either floating points or integer literals. For example,
Specific keywords are supported for some built-in properties. Keywords provide a descriptive name instead of a number. For example:
position:absolute. All properties support the
initial global keyword which resets a property to its default value. See supported properties for a list of keywords.
UIElements supports the following literal color values and functions:
#FFFF00(rgba one byte per channel),
rgb(255, 255, 0)
rgba(255, 255, 0, 1.0)
You can reference assetsAny media or data that can be used in your game or Project. An asset may come from a file created outside of Unity, such as a 3D model, an audio file or an image. You can also create some asset types in Unity, such as an Animator Controller, an Audio Mixer or a Render Texture. More info
See in Glossary with either the
url() functions. For example, specify
background-image: resource("Images/img.png") to specify the
img.png in the
Images directory as the background image. Referenced assets are resolved during import.
resource() function accepts files located under either the
Resources folder or the
Editor Default Resources folder, with the following caveats:
Resourcesfolder, do not include the file extension. For example:
Editor Default Resources, you must include the file extension. For example:
url() function expects the file path to be relative to either the project root or the folder containing the USS file. You must include the file extension. In the following examples, the USS file is located at
Assets\Editor\USS and the
thumb.png background image is located at
For textures, if a file has a version with a
@2x suffix, this file is automatically loaded for retina or High DPI screens.
Use quotes to specify a string value. For example:
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