Which tool would you use to modify the geometry of an element directly in Revit?

The 'Modify' tool in Revit is essential for directly changing the geometry of elements within a model. This tool allows users to select, move, rotate, scale, and otherwise manipulate the shapes and positions of various components. For instance, if you need to adjust a wall's length or relocate a door opening, the Modify tool provides the functionality to select an element and apply the desired geometric changes interactively.

While other tools like the 'Manage' tool focus on settings and configurations, the 'Sketch' tool is often associated with creating or editing the outline of elements rather than directly adjusting existing geometry. The 'Dimension' tool pertains to measuring and providing references within the model rather than modifying geometry. Thus, the Modify tool is distinctly designed for active manipulation of elements' shapes and locations, making it the correct choice for modifying geometry directly in Revit.