Editing DocuSign PDF files is very difficult

Hi all, 

I'm trying to modify a Canadian tax form for DocuSign eSignature, normally I use Adobe Acrobat tool to prepare the PDF file. But actually, I'm not satisfied with the format of the text fields in the forms. It's difficult for me to adjust the size and position of the form so that it can be displayed correctly on the Tax form cells sent to the employee via DocuSign. It will move to a strange position.

How can I adjust it better?