How do I make non-printable template instructions?

I've been tackling this for a little while and to no avail. I am doing a letter head template with areas for the user to click on and start typing their letter. I've done it in an interactive PDF format but i want to take a step further to make it more user friendly.

I want to have non-printing instructions to be able to be viewed but not printed but in which the user can still click on the document and add their text and so forth.

I am open to any other suggestions other than interactive pdf

thanks, thelma