How to change the Stationery in Outlook
You can do so using the Mail Format options. Keep in mind that you can always change the stationery for individual messages.
1. Open the Tools menu and choose Options:
2. The Options dialog box opens. Click the Mail tab:
3. Click the Stationery and Fonts... button.
4. In the Personal Stationary tab, click Theme... button to choose stationery:
5. Click OK.
When you create a new message, Outlook uses the stationery you selected.