The deformed shape plot is an animation of the model based on displacement data for every node in the model at a given time. the user can choose to show an unreformed wireframe of the model as a comparison of the deformed model.
Selecting this menu option is the same as the DEFORMPLOT command. Many of the 3D Plotting Commands will be able to modify the plot from the command line or allow the user to do batch image manipulation using a Prep File