Protect Section in Word without limiting formatting in unprotected sections

"Adapted from Word's help:

On the Tools menu, click Protect Document.
In the Protect Document task pane, under Editing restrictions, select the Allow only this type of editing in the document check box, and then click No Changes or Comments
Select the parts of the document that you want to be unrestricted.
Select the Everyone check box in the Groups box.
Continue to select parts of the document and assign users permission to edit them, as you want.
Under Start enforcement, click Yes, Start Enforcing Protection.
Pick password protection or full authentication

I found this by pressing F1 and searching for ""protect section"""