To choose which slider parameter will be animated, first click on a circle (radio button) to the right of the "Animate" name of its slider. Then click on the button to the right of the radio button. This button starts the animation process. To pause the animation click the button. By clicking the pause button you can pause the progress of the animation so you can leisurely examine the results of whatever the slider parameter is controlling. When you have paused the slider you can click the play button again which gives you the opportunity to continue the animation. One other button is available, a stop button. This button gives you the opportunity to finish the animation without waiting for it to complete. The reason for this is that some of the steps of the calculation or display that you're controlling might take longer times and you might want to be able to exit without completion. To animate the slider in the second row, click its circle which will enable its control buttons. An enabled button is highlighted and appears like this: A disabled button appears like this: .