While viewing a Word document in the Print Preview window, you might notice a typo, or something else that you’d like to fix quickly, before printing. However, the pointer is a magnifying glass, and when you click on the page you just zoom in or out.
To edit the document, you can turn off the magnifier:
In Excel 2007, remove the check mark from Magnifier in the Ribbon, to turn it off.
In Excel 2003, click the Magnifier button on the toolbar, to turn it off.
After you turn off the Magnifier, the pointer will change to an I-beam, and you can click on the document and edit it.