The goal of column view is simple: to let you burrow down through nested folders without leaving a trail of messy, overlapping windows in your wake.
The solution is shown in Figure 2-14. It’s a list view that’s divided into several vertical panes. The first pane (not counting the Sidebar) shows whatever disk or folder you first opened.
When you click a disk or folder in this list (once), the second pane shows a list of everything in it. Each time you click a folder in one pane, the pane to its right shows what’s inside. The other panes slide to the left, sometimes out of view. (Use the horizontal scroll bar to bring them back.) You can keep clicking until you’re looking at the file icons inside the most deeply nested folder.
If you discover that your hunt for a particular file has taken you down a blind alley, it’s not a big deal to backtrack, since the trail of folders you’ve followed to get here is still sitting before you on the screen. As soon as you click a different folder in one of the earlier panes, the panes to its right suddenly change, so that you can burrow down a different rabbit hole.
The beauty of column view is that, first of all, it keeps your screen tidy. It effectively shows you several simultaneous folder levels but contains them within a single window. With a quick ⌘-W, you can close the entire window, panes and all. Second, column view provides an excellent sense of where you are. Because your trail is visible at all times, it’s much harder to get lost—wondering ...