On the formulas tab.
home tab
Design
Data
The Shapes button is located within Insert tab (or even the Home tab) of the Ribbon.
Contextual tab
Data
False the ribbon tab currently displayed is not called the contextual tab. The ribbon tab currently displayed is called the active tab.
For Excel 2007 it is on the Insert tab of the menu ribbon.
Insert Function is the Excel ribbon command on the Formulas tab that is marked "Fx"
ribbon tab is compost of home, insert,page layout etc.
ribbon tab is compost of home, insert,page layout etc.