With a CCK form that any user is able to acccess at the bottom there is a "Preview" button that allows the user to preview the changes they make and scrolling down below the preview shows them the form/fields they can edit.
For large forms with input there is not a clear message that says that the original form they filled out is below the preview... how can I add a message at the top of the Preview that says "Scroll down below the preview to edit the form you submitted?"
I assume that the FORM which you are using is of either BLOCK or PAGE or CUSTOM CONTENT type. All you need to do is check out the .tpl.php file. In there you can Easily modify and display any type of content you want.
Just check out for the function which prints the Form and echo your message above that.