If all you want to do is to hide the formatting marks, click on the ¶ symbol on the Home tab.

Beyond that, without seeing the document and knowing exactly what it is you're trying to achieve, it's impossible to give firm advice. If attach a copy of the document (via the paperclip symbol on the Go Advanced tab) and say what you're trying to achieve, I'll take a look at it.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]