Zooming in and out

With Street Atlas USA, you can view the entire United States and then zoom in for street-level detail. As you zoom in, the Data Zoom level, which is displayed at the top of the Control Panel, increases. Data Zoom level 2–0 shows the entire U.S., and Data Zoom level 16–0 shows the maximum amount of detail for a location.
Beneath the Data Zoom are three buttons that control zooming. These buttons, each with red arrows and pictures of the Earth, are from left to right

• Zoom out three levels: Click the button with three arrows pointing away from Earth.Zoom out: Click the button with the red arrow pointing away from Earth.
• Zoom in: Click the button with the red arrow pointing toward Earth. In addition to the zoom buttons, DeLorme also uses Octave controls, which are up and down arrows next to the Zoom Data level value, allowing you to have finer control over zooming in and out. Click the up arrow to zoom out; click the down arrow to zoom in.

When you click an Octave control, notice that the Zoom Data level number changes. The number to the right of the dash next to the Zoom Data level is the octave value. For example, if the current Zoom Data level were 12-3, clicking the Octave down arrow would zoom in and change the value to 12-4. (Octaves range between 0 and 7, just like a diatonic music scale.) You can also zoom in on a specific area by holding down the left mouse button and dragging down and to the right. This draws a rectangle and will zoom in to that area when you release the mouse button. You can zoom out by holding down the left mouse button and dragging up and to the left.