The Construct Tab contains a variety of tools for modifying geometry. These include ways to reduce the number of points and polygons in all or part of the geometry, and ways to shape the geometry by drilling holes or stenciling the mesh with new points and edges, or connecting meshes. Tools for patching splines, for converting metaballs and metaedges, for toggling SubPatch mode, and for freezing subdivision surfaces into a polygonal mesh are also located here.