Setting window width in Xcode -

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Maybe a very clear question: I want to set the width of the code editor to be exactly 80 characters in Xcode 4. Where do I go to do this? Alternatively, if I can make a vertical line that points to 80 characters, then it will be okay.

Thanks

In Xcode 4: Xcode Menu - & gt; Preferences - & gt; Text editing tab - & gt; Check out the page guide on the column.

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