This document about the solar system is single spaced. If you want to change its line spacing so that there is more space between the lines, you can do that with the click of a button.
To change the line spacing in an entire document, select the document by pressing CTRL+A. To change line spacing in a single paragraph, place the insertion point beside the paragraph.
Then, on the Formatting toolbar, point to Line Spacing , click the arrow, and select the number that you want. Or, on the Format menu, click Paragraph, and then, in the Line spacing box, select the line spacing you want.
Tip If you end up with too much space between paragraphs, look for extra paragraph marks in between the paragraphs. Delete the extra paragraph marks to get rid of the extra space.