Make e-sign non fillable for customer

[Linda34827635gpyi]

Hello, 

When sending a PDF for signature, all text boxes are possible to change. I only want the customer to be able to sign their three designated boxes, and make all other text read-only. How is this possible?

Thank you in advance!

[Linda34827635gpyi]

Hi again, 

I'd love to get som help on this, so if someone knows how I can solve this I'd really appreciate it. 

Thanks!