API Reference > imodeljs-frontend > Tools > ViewUndoTool > iconSpec iconSpec Static iconSpec: string = "icon-window-backward" The icon for this Tool. This may be overridden in subclasses to provide a tool icon. The value is the name of an icon WebFont entry, or if specifying an SVG symbol, use svg: prefix. Defined in core/frontend/src/tools/ViewTool.ts Line 3944 Last Updated: 12 June, 2024