Preview of print

Good morning,

I have a problem when I see and send the print preview by email.

I have a "Preview" Image field and a "Create Offer" button with the following formula:

Preview: = null;
Preview: = importFile (this, printAndSaveRecord (this, "Sale Offer"), "Offer" + "" + Customer.Name + "" + Customer.Surname + "" + 'Offer N °:' + ".pdf")

When I click "Create offer", the offer is created but when I open the preview, as the last field I see the preview of the offer preview (see attachment).
How can I solve?

A thousand thanks