Add protection to a document and restrict changes to specific selections
On the Review tab, in the Protect group, click Protect Document, and then click Restrict Formatting and Editing.
In the Editing restrictions area, select the Allow only this type of editing in the document check box.
In the list of editing restrictions, click No changes (Read only).
Select the part of the document that you want to be unrestricted.
For example, select a block of paragraphs, a heading, a sentence, or a word.
To select more than one part of the document at the same time, select the part that you want, then press CTRL and select more parts while you hold down the CTRL key.
Under Exceptions, do one of the following:
To allow anyone who opens the document to edit the part that you selected, select the Everyone check box in the Groups list.
To allow only particular individuals to edit the part that you selected, click More users, and then type the user names. Separate each name with a semicolon. Click OK, and then select the check boxes next to the names of the individuals that you are allowing to edit the part that you selected.
If you intend to protect the document with user authentication rather than password protection, be sure to type e-mail addresses, not Microsoft Windows or Windows Vista user accounts, for user names.
If you select more than one individual, those individuals are added as an item to the Groups box, so that you can quickly select them again.
Continue to select parts of the document and assign users permission to edit them.
Under Start enforcement, click Yes, Start Enforcing Protection.
Do one of the following:
To assign a password to the document so that users who know the password can remove the protection, type a password in the Enter new password (optional) box, and then confirm the password.
Use strong passwords that combine uppercase and lowercase letters, numbers, and symbols. Weak passwords don't mix these elements. Strong password: Y6dh!et5. Weak password: House27. Passwords should be 8 or more characters in length. A pass phrase that uses 14 or more characters is better. For more information, see
Help protect your personal information with strong passwords
It is critical that you remember your password. If you forget your password, Microsoft cannot retrieve it. Store the passwords that you write down in a secure place away from the information that they help protect.