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I am writing a book and I need to set the odd/even margin on the binding side.

\usepackage[top=2cm, bottom=2cm, left=1cm, right=1cm, headsep=14pt]{geometry}

I need left = 2.1cm for odd pages and for even one left = 1.0cm.

I found


but those change all four sides.

How can I set two different margins on odd/even pages?

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There is actually an option bindingoffset for the package geometry. – Jana Feb 19 '13 at 10:16
up vote 8 down vote accepted

You can do this with the inner and outer keys. The inner (outer) margin is the left (right) margin on odd pages and right (left) margin on even pages. Hence

\usepackage[top=2cm, bottom=2cm, outer=1cm, inner=2.1cm, headsep=14pt]{geometry}

should do what you want.

As mentioned in comments below, the twoside option must also be added, either to the documentclass or geometry. The book class has this by default, while report and article does not.

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What happens if you set innter and outer but don't pick twosided? – DanielSank Sep 30 '14 at 3:23
@DanielSank It would have taken you less time to just test that yourself, rather than wait for my reply ... The inner margin will be the left, the outer the right. \documentclass{article} \usepackage[outer=1cm, inner=5cm]{geometry} \usepackage{lipsum} \begin{document} \lipsum\lipsum \end{document} – Torbjørn T. Sep 30 '14 at 6:33

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