API Reference > imodeljs-common > Symbology > ThematicDisplayProps > axis axis axis: undefined | XYZProps For ThematicDisplayMode.Height, this is the axis along which to apply the thematic gradient in the scene. For ThematicDisplayMode.Slope, calculating the slope of a surface is done in relation to the axis. Defaults to {0,0,0}. Defined in core/common/src/ThematicDisplay.ts Line 394 Last Updated: 11 June, 2024