Alignment signature refers to placing signatures (signature, name, title, etc.). ) on the side or bottom of a document or letter page and horizontally aligned with text or other content. Alignment refers to the arrangement of words or elements according to certain rules, such as left alignment, right alignment and center alignment; Signing refers to signing one's name, position, date and other personal or unit information at the end of the document. So aligning signatures means signing (signature, name, title, etc.) in a document or letter. ) on the side or bottom of the page, horizontally aligned with text or other content.