Version: 2021.3
USS properties data types
USS properties syntax

USS properties reference

The following table lists the USS properties in UI(User Interface) Allows a user to interact with your application. Unity currently supports three UI systems. More info
See in Glossary
Toolkit.

The table indicates which properties are inherited and their animatability. For an inherited property, the element gets the value from its parent element if you don’t specify a value for it. The following example uses an inherited property to set the font for all elements.

:root {
    -unity-font: resource("Font/consola.ttf");
}

Click the property name to see detailed information about that property.

Note: The usage of a USS property that’s the same as the CSS property links to the Mozilla developer documentation.

Property Inherited Animatability Description
align-content No Discrete Alignment of the whole area of children on the cross axis if they span over multiple lines in this container.
align-items No Discrete Alignment of children on the cross axis of this container.
align-self No Discrete Similar to align-items, but only for this specific element.
all No Fully animatable Allows resetting all properties with the initial keyword. Does not apply to custom USS properties.
background-color No Fully animatable Background color to paint in the element’s box.
background-image No Discrete Background image to paint in the element’s box.
border-bottom-color No Fully animatable Color of the element’s bottom border.
border-bottom-left-radius No Fully animatable The radius of the bottom-left corner when a rounded rectangle is drawn in the element’s box.
border-bottom-right-radius No Fully animatable The radius of the bottom-right corner when a rounded rectangle is drawn in the element’s box.
border-bottom-width No Fully animatable Space reserved for the bottom edge of the border during the layout phase.
border-color No Fully animatable Shorthand for border-top-color, border-right-color, border-bottom-color, border-left-color
border-left-color No Fully animatable Color of the element’s left border.
border-left-width No Fully animatable Space reserved for the left edge of the border during the layout phase.
border-radius No Fully animatable Shorthand for border-top-left-radius, border-top-right-radius, border-bottom-right-radius, border-bottom-left-radius
border-right-color No Fully animatable Color of the element’s right border.
border-right-width No Fully animatable Space reserved for the right edge of the border during the layout phase.
border-top-color No Fully animatable Color of the element’s top border.
border-top-left-radius No Fully animatable The radius of the top-left corner when a rounded rectangle is drawn in the element’s box.
border-top-right-radius No Fully animatable The radius of the top-right corner when a rounded rectangle is drawn in the element’s box.
border-top-width No Fully animatable Space reserved for the top edge of the border during the layout phase.
border-width No Fully animatable Shorthand for border-top-width, border-right-width, border-bottom-width, border-left-width
bottom No Fully animatable Bottom distance from the element’s box during layout.
color Yes Fully animatable Color to use when drawing the text of an element.
cursor No Non-animatable Mouse cursor to display when the mouse pointer is over an element.
display No Discrete Defines how an element is displayed in the layout.
flex No Fully animatable Shorthand for flex-grow, flex-shrink, flex-basis
flex-basis No Fully animatable Initial main size of a flex item, on the main flex axis. The final layout might be smaller or larger, according to the flex shrinking and growing determined by the other flex properties.
flex-direction No Discrete Direction of the main axis to layout children in a container.
flex-grow No Fully animatable Specifies how the item will shrink relative to the rest of the flexible items inside the same container.
flex-shrink No Fully animatable Specifies how the item will shrink relative to the rest of the flexible items inside the same container.
flex-wrap No Discrete Placement of children over multiple lines if not enough space is available in this container.
font-size Yes Fully animatable Font size to draw the element’s text.
height No Fully animatable Fixed height of an element for the layout.
justify-content No Discrete Justification of children on the main axis of this container.
left No Fully animatable Left distance from the element’s box during layout.
letter-spacing Yes Fully animatable Increases or decreases the space between characters.
margin No Fully animatable Shorthand for margin-top, margin-right, margin-bottom, margin-left
margin-bottom No Fully animatable Space reserved for the bottom edge of the margin during the layout phase.
margin-left No Fully animatable Space reserved for the left edge of the margin during the layout phase.
margin-right No Fully animatable Space reserved for the right edge of the margin during the layout phase.
margin-top No Fully animatable Space reserved for the top edge of the margin during the layout phase.
max-height No Fully animatable Maximum height for an element, when it is flexible or measures its own size.
max-width No Fully animatable Maximum width for an element, when it is flexible or measures its own size.
min-height No Fully animatable Minimum height for an element, when it is flexible or measures its own size.
min-width No Fully animatable Minimum width for an element, when it is flexible or measures its own size.
opacity No Fully animatable Specifies the transparency of an element and of its children.
overflow No Discrete How a container behaves if its content overflows its own box.
padding No Fully animatable Shorthand for padding-top, padding-right, padding-bottom, padding-left
padding-bottom No Fully animatable Space reserved for the bottom edge of the padding during the layout phase.
padding-left No Fully animatable Space reserved for the left edge of the padding during the layout phase.
padding-right No Fully animatable Space reserved for the right edge of the padding during the layout phase.
padding-top No Fully animatable Space reserved for the top edge of the padding during the layout phase.
position No Discrete Element’s positioning in its parent container.
right No Fully animatable Right distance from the element’s box during layout.
rotate No Fully animatable A rotation transformation.
scale No Fully animatable A scaling transformation.
text-overflow No Discrete The element’s text overflow mode.
text-shadow Yes Fully animatable Drop shadow of the text.
top No Fully animatable Top distance from the element’s box during layout.
transform-origin No Fully animatable The transformation origin is the point around which a transformation is applied.
transition No Non-animatable Shorthand for transition-delay, transition-duration, transition-property, transition-timing-function
transition-delay No Non-animatable Duration to wait before starting a property’s transition effect when its value changes.
transition-duration No Non-animatable Time a transition animation should take to complete.
transition-property No Non-animatable Properties to which a transition effect should be applied.
transition-timing-function No Non-animatable Determines how intermediate values are calculated for properties modified by a transition effect.
translate No Fully animatable A translate transformation.
-unity-background-image-tint-color No Fully animatable Tinting color for the element’s backgroundImage.
-unity-background-scale-mode No Discrete Background image scaling in the element’s box.
-unity-font Yes Discrete Font to draw the element’s text, defined as a Font object.
-unity-font-definition Yes Discrete Font to draw the element’s text, defined as a FontDefinition structure. It takes precedence over -unity-font.
-unity-font-style Yes Discrete Font style and weight (normal, bold, italic) to draw the element’s text.
-unity-overflow-clip-box No Discrete Specifies which box the element content is clipped against.
-unity-paragraph-spacing Yes Fully animatable Increases or decreases the space between paragraphs.
-unity-slice-bottom No Fully animatable Size of the 9-slice’s bottom edge when painting an element’s background image.
-unity-slice-left No Fully animatable Size of the 9-slice’s left edge when painting an element’s background image.
-unity-slice-right No Fully animatable Size of the 9-slice’s right edge when painting an element’s background image.
-unity-slice-scale No Fully animatable Scale applied to an element’s slices.
-unity-slice-top No Fully animatable Size of the 9-slice’s top edge when painting an element’s background image.
-unity-text-align Yes Discrete Horizontal and vertical text alignment in the element’s box.
-unity-text-outline No Fully animatable Outline width and color of the text.
-unity-text-outline-color Yes Fully animatable Outline color of the text.
-unity-text-outline-width Yes Fully animatable Outline width of the text.
-unity-text-overflow-position No Discrete The element’s text overflow position.
visibility Yes Discrete Specifies whether or not an element is visible.
white-space Yes Discrete Word wrapping over multiple lines if not enough space is available to draw the text of an element.
width No Fully animatable Fixed width of an element for the layout.
word-spacing Yes Fully animatable Increases or decreases the space between words.
USS properties data types
USS properties syntax