Customize PDF file name when downloading

I want to label a form by the name that the person uses  in the form when  I download the form    

one of my forms does this  but another one has a bunch of numbers as the name for the form.     How can I fix this?  thank you. 

You can assign custom file names for the PDF Submission Report of your form by following this guide:

How-to-Assign-a-Custom-Name-to-a-PDF-Document-with-PDF-Editor