How to Turn Title Name on Top of all PDF Pages OFF

How can the title name be turned off on the top of every single page in PDF export, please?

Assuming you mean ‘when I compile a project to PDF’, then you do that in the Compilation Dialogue. Make sure you’re in All Options, then there’s an option down the left hand side (Layout, I think) which allows you to specify page headers / footers etc.

On the other hand, if you’re simply printing a number of documents out from the Binder to get to the standard Mac Print dialogue, then you can change the headers in the File > Page Setup > Scrivener dialogue.