This is a paragraph formatting option. It applies to particular paragraphs, not to a document.
It is time for you to learn something about Styles if you are using Word on a regular basis. Doing so will save you countless time and a lot of frustration.
The Importance of Styles in Microsoft Word
I use the Body Text style for most of my text. You can modify this to meet your needs. You can change your Normal.dotm template so that it opens in Body Text style.
You first will likely need to change its visibility using the Manage Styles dialog.
The Manage Styles Dialog by Suzanne Barnhill, MVP
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