How can I save a file as an older format using Office 2007?
Left click on the Office Button and navigate to Save As (simply clicking on the Save button will save the file with the new XML format). Once the Save As window opens, left click on the down arrow next to save as type and then select the file type and format as Word/Excel/PowerPoint 97-2003 Document (.doc, .xls, .ppt). Then left click on Save.