This sample demonstrates how to morph a mesh by mesh box/interior node.
import a mesh model, rotate the mesh to be a position shown as the following picture.
original mesh
Click 'FEM->Element Tools->Morph', morph dialog will show. Select Option 'Mesh Box/Interior'. In the element selection panel, click the radio button 'Poly' and select a sub-mesh, then click right mouse buttton.
selected sub-mesh
click left mouse button to select a interior node in the sub-mesh, then click right mouse button to confirm this node.
morphed cage and morphed mesh
Click button '+' to morph the selected sub-mesh. The morphed mesh and the original mesh are shown in the following picture.
the original mesh (red) and the morphed mesh (green)