document window
Document window
The word you are probably looking for is "preamble" which is the introductory portion of a legal document.
Secret
The correct NATO portion marking for information containing NATO Confidential information in a U.S. document is "NATO CONFIDENTIAL." This marking should be prominently displayed at the top and bottom of the document, as well as on each page where the classified information appears. Additionally, any portion of the document that contains NATO Confidential information should be marked to indicate its classification level.
Secret
paragraph
False
Select that portion then click another formatting style in Home tab Style section.
The Header
clipboard
To insert a portion of text at the top of the document, you have double click on the top and then a section called header will come up. Then you type the text in that section. This text will come at the top of every page you work on after.