This function provides two options for the user to decide the position of the section plane: fixed or moved.

1.       FIXED

If the user selects this option, the section cut plane is fixed. The section line will be made when the model intersects with the fixed section cut plane in each time step. Due to the relative movement between the model and the fixed section cut plane, the shape of the section line varies along with the model movement. Therefore, the section line varies in different time steps.

2.       MOVED

If the user selects this option, the section cut plane is moved with the model. The section cut plane always intersects with the same elements in the model in different time steps. This will assure that the section line is always cut from the same elements during the animation.