7 Changing the Default Font and Line Spacing in Word 2007.6 Set Word Default to Automatically Save in Compatibility Mode.5 Saving Microsoft Word 2007 Files in Compatibility Mode.4.2 Inserting Merge Fields in Rules / Manually Editing Merge Code.4 Conditional Text (Rules) in a Mail Merge.3.2.2 Use Your Contacts File as a Data Source.3.2.1 Use a MS Excel Spreadsheet as a Data Source.3 Using Mail Merge in Microsoft Office 2007.2 New Interface Elements in Office 2007.