To change the default line spacing: 1  Click the [Home] tab > Locate the Paragraph group. 2  In the lower-right corner of the Paragraph group, click the arrow. 3  From the [Indents and Spacing] tab > Locate the Spacing section.  From the Line spacing drop-down list, choose the spacing you would like Word to use by default.
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Instructions. Exit out of your Outlook application. Go to your Windows Desktop, and click on the \Start\ button. Click on \Run,\ and type \regedit\ into the text box that appears.If you are using Windows Vista, after clicking on the Start button, type \regedit\ into the Search text box.The registry editor will open.nstructions. Exit out of your Outlook application. Go to your Windows Desktop, and click on the \Start\ button. Click on \Run,\ and type \regedit\ into the text box that appears.