Template:Blender 3D: HotKeys/3D View/Edit Mode/CTRL-LMB

• CTRL+LMB — drag to lasso-select (add to selection). Alternatively, click to perform one of the following actions:
  • if nothing is selected, a new unconnected vertex is added to the current mesh.
  • if a single vertex is selected or vertexes on a non-enclosed object are selected, a copy will be created and will be joined to any previously selected vertices by an edge, or edges.
  • if an enclosed mesh (a cube, etc.) is selected, an unconnected copy will be created under the cursor.