For sharing animation in two windows, such as in the main McIDAS-V view window and a vertical cross section control, open the animation properties dialog in each animation control by clicking on the icon. Toggle on the Shared box and click on Ok. Then using either animation control will effect animation in both windows.
You can share other kinds of layer controls, such as sharing one selector line in vertical cross sections. This is toggled on by clicking on the Share checkbox under the View menu in the control window.