The signature does not appear as a signature until it is output in an image such as a PDF, TIFF, JPEG or GIF. Depending on the image type and access to a graphics program, you could theoretically "cut" the signature from the image.
Yes, there can be a list of words which are provided as candidates for the handwriting interpretation of specified form fields. They can be imported into the database or can be added as a user verifies handwriting in our Form or EDW™ Field Verifier. This works much like adding a word to the spell checker "dictionary" of word processing applications.