If you want to add a footer to an Excel spreadsheet, click the "Insert" tab on the ribbon menu. Then click "Header & Footer" within the "Text" group of options.

To add hyperlinks to Excel, you can type the corresponding URL, add hyperlinks using the Link feature or use the HYPERLINK Function.

A complex Excel 2007 workbook could require multiple sheets. By default, Microsoft provides three sheets on each workbook, but you can add as many as you need.