API Reference > imodeljs-frontend > Tools > ToolAdmin > activeToolChanged activeToolChanged activeToolChanged: BeEvent<(tool: Tool, start: StartOrResume) => void> = new BeEvent<(tool: Tool, start: StartOrResume) => void>() Event raised whenever the active tool changes. This includes PrimitiveTool, ViewTool, and InputCollector. param newTool - The newly activated tool Defined in core/frontend/src/tools/ToolAdmin.ts Line 779 Last Updated: 13 June, 2024