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Click-drag the selection tool (see red box below) to move in a more controlled fashion through the data. Choose the selection tool (default tool) and then click anywhere near the edge of the image. Keep the mouse pressed and drag the cursor (arrow) to the left or right. The display will continue moving at a steady pace for as long as the click-drag is held. This click-drag interaction is similar to how you can scroll up or down the select-scrolling in many word processing programs, where you can select text and then, by continuing to select/drag the cursor up or down to , you scroll through the document.
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