Chapter 3: Reply to an email
Using the Windows 10 Mail App with SuperNova

To do this:

Open the email or select the email in the message list. Press CONTROL + R to reply to the sender or CONTROL + SHIFT + R to reply to all recipients on the To and CC line. A message window opens with the cursor in the message body. Type a reply. When you are ready to send the email, press ALT + S. Mail closes the message window and sends the email.