My I-751 was rejected for signature even though the form was signed. Can I reprint some of the form pages to re-sign on a new page?

The best thing to do is probably to submit a new petition. While giving in new signature pages only may be okay, you might run into a clerk who does not think so and sends you back the package again. While not harmful (unless you miss the deadline for submission), that would probably be more inconvenient than submitting a new form. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.