A family of Microsoft word processing software products for creating web, email, and print documents.
You can create a Header quick part or AutoText entry for each firm letterhead. With the insertion point in the desired header, select the entire header content and, on the contextual Header & Footer Tools | Design tab, in the Header & Footer group, click Header, then Save Selection to Header Gallery... Choose a name for the letterhead and click OK. In a blank document, you can then select this header.