Layout of the e-mail sent through the SBO mailer

I have a question concerning the e-mail layout sent from SAP Business One (SBO) mailer.

Currently, (the default) each email sent by the mailer (e.g. by pressing the e-mail button for an order), the e-mail contains the original text. horizontal line, a table with the associated documents, another horizontal line, etc. etc.

What do we need to do to change this?

The same counts for the mailing direct through Outlook. (not open e-mail in outlook, but the checkbox Mail through Outlook).

Looking forward to your response.

(p.s. using SBO 9.0 PL08 and a newbie within SBO)