Hanging indents are used in the APA citation style. A hanging indent is required to format your references properly. See the image below for an example of what a hanging indent looks like.
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Select the text where you want to add a hanging indent.
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Go to Home > Paragraph dialog launcher > Indents and Spacing.
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Under Special, select Hanging.

You can adjust the depth of the indent using the By field.
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Select OK.