Select Template dialog
This dialog lets you load one of the built-in HTML templates.
Select the template on the left hand side. The preview will appear on the right hand side. Once you find the template you like, click on the Load button to load the template into AY Mail.
You can adjust the template for your needs. Once you change the template, you can save it by selecting Message->Store from the menu. You then will be able to load your template any time by electing Message->Load.