Guides are thin lines that help you align various objects. There are two types of guides: Margin guides, which are blue lines that mark the edges, or margins, of the printable area on each page of your publication. Margin guides are automatically created when you set your page margins.
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Margin guides
Guides are thin lines that help you align various objects. There are two types of guides: Margin guides, which are blue lines that mark the edges, or margins, of the printable area on each page of your publication. Margin guides are automatically created when you set your page margins.