Using this utility you can define boundary conditions, such as Melt Entrance, Gas Entrance, Coolant Entrance Coolant Exit and Symmetry Node.
After clicking this button, a selector for node appears. Once you pick the node from the graphics area, the following dialog appears.
Depending upon the BC type selection from the above dialog, the respective BC collector is created.
Symmetry Node: This creates a symmetry Boundary condition on the selected node with the given symmetry node count. The following figure shows the representation of symmetry model with reference to original model. Please refer to Moldex3D help for additional details.