All you can do is attach the PDF to the email. You can't control whether people see it in the body of the email. If you want that, you need to send an HTML email.
thank you, I have never done that, however, on an internet search I see there are programs like Thunderbird that can help me..is that the right direction? thanks
I can't vouch for Thunderbird since I don't use it but, any web page editor will do the trick.
Here is a decent article on About.com on how to do this. Good luck.