Noteman says: See Navigating your music for a step-by-step tutorial overview on the various ways to view your document.
Use the Zoom tool to magnify or reduce the music as it’s displayed on the screen. If the Zoom tool is selected while using Scroll View, the measure clicked is enlarged and positioned to the left. If the Zoom tool is selected while using Page View, click and drag across the music to enlarge a selected region, making it easier for you to do detail work. If you press