To zoom in on a particular time range, use the Zoom In icon at the top of the chart window. Place your cursor on the start of the time range you would like to analyze, and simply drag your cursor to the end of the range you would like to see. When you release the mouse, the chart will zoom in to display a more detailed view of the specified range. To undo your zoom, use the Zoom Out icon.
To pan within your chart horizontally, use the normal cursor tool or the Pan tool (hand icon in the Draw menu) and then drag left or right across the chart.