To change paragraph formatting for an already existing document, you have to change the paragraph style, then apply it to the whole document. Change paragraph formatting for an existing document
I like to set my default template to contain the paragraph formatting I use for most documents, then change the style in individual documents, if needed. Just remember that the default template styles can be overridden when creating new styles for a particular document. Note: changing the default template does not change styles for previously created documents.
Those changes become the default setting for all new documents based on that template until you change them again. When you click the Default button, all settings in the Paragraph dialog box are saved to the Normal.dotm template, which is the default template in Word 2007. Change the paragraph indentation and line spacing settings as desired.On the Home tab in the Paragraph group, click the launcher to open the Paragraph dialog box.To save changes to the default Word 2007 template, follow these steps: Change paragraph formatting for the default template
HOW DO I RESET WORD DEFAULT SETTINGS HOW TO
Changing the template does not change already existing documents, so instructions for how to apply the paragraph formatting to all paragraphs in a document you already created are included. To make your paragraph formatting changes permanent and available for any file, you need to save the change to the Normal.dotm template.