If your paragraph formatting changes do not work, it is often helpful to clear all formatting and styles so you can start over.
In Word 2007, the most likely cause for formatting changes that won't stick is that there is an overriding style attached to the paragraph.
Here is how to remove all styles so you can stop formatting changes from misbehaving.
To remove all styles from a block of text, open your Word document, then follow these steps:
That's it! You now have unstyled text that is ready to be formatted as needed.
Want a faster way to clear formatting? If you don't like launching the Styles task pane, select the text (press Ctrl+A to select all text) then click the Clear Formatting button.
Using Clear All should remove all styles and formatting from the selected text and strip it down to the Normal style, which is the default text for the document. However, text boxes, headers, and footers have to be cleared individually.
If none of the text cannot be reformatted, the document may be protected from formatting changes. If that is the case, you won't be able to reformat the document unless you remove the password.
The instructions for removing a password to allow editing are found here: http://www.word-tips.com/cannot-edit-word-document.html. This page is in reference to forms, but the process is the same for any document. By the way, you have to know the password to remove it!
Return from Clear All Formatting to Document Formatting