What is the correct format of the signature?

1, there are two kinds of signatures: double and single. In the two paragraphs, the object and author of the book are placed above and below respectively, the former is the upper paragraph and the latter is the lower paragraph. The preceding paragraph shall specify the name, source and recipient's name of the work; The next paragraph describes the date, place and author's name of creation. A single segment has a long segment, a short segment and a difference segment.

2. Inscription: In ancient times, letters, calligraphy and paintings all had inscriptions. When giving gifts, the name and year were written vertically with a brush to show the giver and the recipient. This is also a form of expression of calligraphy art. A calligraphy work should be completed in a holistic sense, and the inscription can show the accomplishment and talent of a calligrapher. Nowadays, many people sign official documents and notes, which are generally written horizontally, indicating that they have legal effect.