The document discusses various functions and features of Microsoft Excel. It describes how to open existing Excel workbooks using the .xlsx file extension. It explains different ways to navigate worksheets using arrow keys, scrollbars, or the mouse. It also discusses how to use Excel's help system by searching topics or browsing directories. Finally, it summarizes how to use Backstage view to access file management features like saving, printing, and setting the print area for only a selected portion of the workbook.