If tracking an object, mark its position on every frame by holding down the shift key and clicking the mouse (crosshair cursor) as the video automatically steps through the video clip. Note: don't skip frames--if you do, velocities and accelerations cannot be determined. Track the ball until end of frame. Plot and analyze the tracks The Plot View displays graphs of track data. To plot multiple graphs, click the Plots button and select the desired (3) plots number. Click the x- or y-axis label to change the variable plotted on that axis. In this video, choose y versus t, vy versus t & ay versus t.