If you would like to enable Shared Workbook option, here's a way to add it to Excel Quick Access Toolbar. It is hidden under Excel Options.

Learn how to add Windows Calculator to the Excel Quick Access Toolbar for performing quick calculations. The Quick Access Toolbar in Excel is one place where all your shortcuts can be placed ...

Learn how to add superscript and subscript buttons to the toolbars in Word, PowerPoint, and Excel in both Office 2004 and 2008.