You may not know this, but the iTunes music store is basically just a customized web browser of sorts. When you click an object in the store, it’s just like clicking a hyperlink on a Web page. Now, there are some restrictions in this customized browser which make it not quite as nice to use as a “real” broswer. For instance, you can’t use tabs to open multiple music store pages at once (why not, Apple!?). Nor can you create bookmarks from content that you’d like to revisit regularly.
But there are some browser-like things you can do. You can, for instance, drag and drop a link from the iTunes window into another app’s window (such as iChat), which will create a link to that object in the store. You can even do the drag-and-drop trick with the navigational “tabs” at the top of the iTunes window. And here’s one more—you can quickly jump back (or forward) anywhere along your browsing path by clicking and holding on either the left or right arrow button. When you do, a pop-up window appears, from which you can quickly jump to any of the major pages between the store’s home page and the currently-viewed page:
While this may not be a huge timesaver, it does make it easy to jump around within the store, without having to move back or forward a screen at a time.