modifying form fields in Acrobat X Pro

Thank you, try67.

I did find the Tools > Forms > Edit as suggested. However, it was grayed out. After a little thinking about it, I had digitally signed the document and even though I did not choose to lock it after signing, It does not let you edit the document unless you 'unsign' it. Once you clear the signature, the Edit option is available and then I am able to resign after editing.

Thank you for your assistance.