How do I create a new template?

Click on the gear icon in the upper right corner
Go to 'Settings'
Click on the relevant template group in the left menu ('General templates', 'Account Statement Templates' or 'Reminder templates')
Click on 'Add new template'.
After you chose the correct company/branch, click on 'Add a new language' to edit the content of your new template.
Click on 'Save' when you are ready.