1. font size: The standard usage of official document subtitle font size is: No.3 bold font for the first-level title, No.3 bold italic font for the second-level title, No.3 bold imitation song for the third-level title and No.3 imitation song for the fourth-level title. This is different in different document types, but usually following such standards can ensure the professionalism and consistency of documents.
2. Use of serial numbers: The hierarchical order of subtitle serial numbers should be correct, such as "I, 1" instead of "1, 1". This sorting method helps readers to quickly identify different levels of subtitles.
3. Logical relationship: the subtitles to be written must be logical, so as to ensure that there is a certain logical relationship between the subtitles and the next-level titles, between the subtitles themselves and between the subtitles, with orderly levels and smooth connection.
4. Content core: subtitles should be loyal to the core text of this part of the content. This means that subtitles should not only be attractive, but also accurately reflect the essence of the content.
5. Format setting: In Word documents, the formats of titles at all levels can be unified by setting corresponding styles. This includes font size, line spacing, alignment, etc.
6. artistry and practicality: subtitles should not only pursue artistry, but also serve the theme, and should not be too artistic and ignore the content. At the same time, the subtitles should be similar in format and equal in words, forming a parallel relationship, giving people a neat and beautiful feeling.
7. Concise and accurate: subheadings should be concise and accurate, and don't divide words when two lines are really needed. This helps to keep the documents clean and professional.