From the Format menu, click Paragraph. The Paragraph dialog open.
Under Spacing:
Before: Select the amount of space you want to leave above each paragraph.
After: Select the amount of space you want to leave after each paragraph.
Line spacing: Select Single, 1.5, Double, Exactly, or Multiple.
At (for Multiple and Exactly): Enter the spacing (in points) that you want to leave between selected lines.
To save your selections, click OK.