File → Page Setup → Margins. There are up, down, left and right, which can be set.
The titles of chapters, sections and articles are (that is, 0.5 lines before and after)
The text is 1.5 times of line spacing, and there are no blank lines (i.e. zero lines) before and after paragraphs.
These two sentences are to set the format of the style. Simply put, they are to set a format for the title, subtitle and text of the article.
Click Format → Style and Format, and a window of styles and formats will appear on the right. Click on the title 1 to modify, and then click on the format → paragraph, where it is set to the required single-line spacing, 0.5 lines before and after the paragraph, and then confirm that the rest is set like this, and then it can be used in the article. Roman numerals are set in an abstract directory.
This needs to be inserted into section break → next page and disconnected from the previous section before it can be operated.