How can I edit email notifications, invoices and credit notes template?

To edit the email notifications template,

• Navigate to gear icon > More Settings > Email Notifications.
• Click on Default button adjacent to the notifications you want to edit.
• In the edit screen next, edit your changes and click on Save As New button to save it as a new template or you can overwrite the existing one by clicking on Save button.

To edit invoice templates,

• Navigate to gear icon > More Settings > Templates > Invoices.
• Click on the edit button present on the template to customize.
• After editing, click on Save.

To edit credit notes templates,

• Navigate to gear icon > More Settings > Templates > Credit Notes.
• Click on the edit button present on the template to customize.
• After editing, click on Save.