Hold the left mouse button down as you drag the slider above the image (or use the arrow buttons) to fade between the MODIS 10.7-12.0 micrometer IR difference product and the corresponding 8.5-10.7 micrometer IR difference product at 08:45 UTC on 20 Feb 2001. To zoom, click on the "Zoom" button, and then click the "hand" cursor on the image where you want to center the zoom.