To start the replay simply click on the Play button on the Replay toolbar at the top of the screen. To pause the replay click the Pause button. Once the replay is paused the time view can be manually moved by placing the mouse over the horizontal bar of the replay span, depressing the left mouse button and dragging the span. The replay span can be changed by placing the mouse over one of the vertical bars if the replay span, depressing the left mouse button and dragging the width. Note that in order to adjust the replay speed the time shown in the replay bar does not necessarily correspond to the time of the experiment.