<p>In Excel 2013, each of your workbooks opens in its own window, similar to Word and PowerPoint. This means that each workbook has its own ribbon and top-level window frame that you can move and resize independent from your other open workbooks. This functionality can improve multitasking, visibility, and analysis across workbooks. In this post, we'll discuss some of the more advanced aspects of these changes, in particular how to have workbooks running in different instances (or processes) of Excel. </p>