Click the small tab that appears at the top left of the document. The ruler slides right when you move your mouse over it, then slides all the way across the top of the document when you click on it.
Click the Paragraph icon, click the Single, One and a Half, or Double Spacing icon.
Click the Paragraph icon, enter a number in the Spacing Above or Spacing Below box, click the Up or Down arrow.
Click the Paragraph icon, click the Increase/Decrease Indent icon or use the ruler. Drag the left margin indicators so that they dock together, then move them as a single indicator.
Using the ruler, drag the upper half of the margin indicator left or right to the location you want.
Click on the ruler, then click on the appropriate tab stop or stops.