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Line spacing is the vertical spacing of the paragraph’s lines. It can be expressed as a fixed amount in points or as a percentage of the line height. You can set line spacing to any amount you like, as described in the following sections. You can also set different line spacing for different paragraph styles. (Paragraph styles are discussed in Chapter 8, “Working with Templates and Nonstandard Layouts.”)
You can quickly switch a paragraph among a few common line-spacing settings with the Line and Paragraph Spacing button on the Home tab. The choices are measured in multiples of the text height: 1.0, 1.15, 1.5, 2.0, 2.5, or 3.0.