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Revised 8/5/2008
Use the scroll thumb to move the timeline left and right. Depending on your browser, the left and right arrow keys may also work; hold them down to scan left and right, you may have to click on it first to give it focus. You can click on a bullet or colored bar for a popup with a short explanation. To make the popup go away move the mouse over 'close' in the upper right corner, or click on another link.