From the tab Settings > General options, you can add a default logo and enable the use of mini-icons for social media links.
Furthermore, you can select a different template for all of the following email types listed below:
- New order
- Cancelled order
- Failed order
- Order on-hold
- Processing order
- Completed order
- Refunded order
- Customer invoice / Order details
- Customer note
- Reset password
- New account
- WordPress emails