The TransformOriginX property in the Sandbox.UI.BaseStyles class represents the transform-origin-x CSS property. This property specifies the x-coordinate of the origin for transformations applied to an element. It is a nullable property of type Sandbox.UI.Length, allowing you to define the origin point in various units such as pixels, percentages, etc.

To use the TransformOriginX property, you can set it to a specific length value to define where the x-origin of the transformation should be. This is useful when you want to control the pivot point for transformations like rotation, scaling, or skewing on the x-axis.