When you're done, you can click on the 'Close' tab on the floating bar. The items in the header and footer will appear greyed out, but don't worry; this only means the they have been set. The cursor will then appear on the first line where you can begin typing your letter.
Whether you are a technical writer working for a single firm or a freelance writer working for many companies, you can benefit from creating templates for your documents. In the long run a good outline will save you time and effort, and deliver that elusive consistency to your material that users will appreciate. Here's how you go about it.