Now would be a great time to just sit and mess around to get comfortable with your cursors and the zooming in and out functions. Really, it'll take maybe two minutes to explore all these display features, and then you'll know how they work. Try moving the black crosshair, then just the horizontal cursor. Now try it with the red one. If you don't see all your cursors, they either haven't appeared yet or they're at the edge of your spectrum display. Click in the spectrum region and cursors should appear. If they don't, they're at some edge or another. Click-hold near an edge and drag your pointer into the spectrum to get a cursor away from an edge. Once you see all four cursors, define a box (the "bounded region" of Figure 3.13, “Key features of the Spectrum Window”), and click the "expand" button on the Spectrum Window button bar. Keep doing that a few times, then try scrolling back to previous views with the "Previous" button. Try the other buttons out and see what they do. Don't worry, they won't break anything!