That is the inside margins are the same width and the outside margins are the same width.
Explain inside outside and gutter margins.
The video and step by step instructions explain how to set page size and margins for books with and without bleed.
The gutter margin is a typographical term used to designate an additional margin added to a page layout to compensate for the part of the paper made unusable by the binding process.
In a facing pages layout word refers to this type of layout as mirror margins the gutter margin is on the very inside of both pages.
So if after you entered a value for the gutter margin you choose normal in the multiple pages list and you later printed the document on the front and back sides of a sheet the gutter margin can only prevent text from being obscured on only one side.
In a facing pages layout word refers to this type of layout as mirror margins the gutter margin is on the very inside of both pages.
Change the margins of the landscape section.
The bottom margin which is the outside margin in portrait orientation will still be correct.
For more information on bleed see our print options help page.
But on 9 mar 2010 book page layout for a long narrative you wrote you want to keep the inside margin the one in the gutter or at the binding smaller than the outside because when the book is held open this will essentially double in size combining the inside margins of both pages in a space in the middle of the book.