Employee Self Onbaording - edit email message

Hello,

I'd really like to be able to edit the message in the email that is sent to new employees via the self onboarding function.

The message is currently very generic and even looks a bit like spam.

It asks the employee to email any queries through, but then does not provide a name or email address. It would be good to be able to add our company logo & contact details.

How can I edit this message to make it more customised?