you can use custom CSS for hiding things from your pdf print.
This article shows you how to apply css for the print in general: Set margin for "Print to PDF"
If you need to hide additional parts of your form I recommend you to use your browsers developer tools and the DOM inspector to find the controls you want to hide and find the classes/IDs you can use in your CSS.
You can hide anyhting this way. Just give your control a css class and use "visibility: hidden !important;" in your css as shown in the linked articles.
If you mean the header that is showing the image, the image itself has the class "Nintex-Forms-banner". but there is another image lying below that has no class set, so you need to provide one yourself.
I dont want to hide the banner, just the useless verbage at the top of the form when you print, here is a copy of the print preview, the top before the form title is what i need to hide.
I solved it. In Form Settings, Custom CSS enter the following;
display: none !important;
The blue suite bar will no longer be seen when printing the form or in print preview.