My Excel 2010 says Smart tags
Smart tags are not supported in Excel 2010. Smart tag indicators (such as the purple triangles in the corners of cells) are no longer displayed in the worksheet when you select a cell or move the pointer over the cell. Instead, you can right-click a cell to view any custom actions associated with its contents by clicking Additional actions on the shortcut menu.
Additional actions are disabled by default, but you can enable or disable this functionality on the Actions tab of the AutoCorrect dialog box (File tab, Options, Proofing category, AutoCorrect Options button).
Even after following these instructions, I had no success. Tom 2/16/13