I have Word 2010 on a ASUS G75V using WIN 7
I was handed a document in which the writer did
not use the Word built-in heading styles and created his own instead.

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This company has newer docs
which use the built-in heading styles.

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My question:
In which version of word were the built-in heading styles first introduced?
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Can I join both types of docs into 1 manual and generate a TOC?
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It's my understanding that chapter numbering does not work unless all the docs use the built-in heading styles.
Is that still correct?
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