Change the spacing between every single line by staying on Indents and Spacing> Spacing> Line spacing and choosing Single, 1.5 lines, or Double for a full double-space between lines. Choose the number of line spaces you want from the drop-down menu, or create custom line spacing by choosing Line Spacing Options. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.