If you start a new line in a Writer text document by typing three or more hyphen characters and press the Enter key, the characters are removed and the previous paragraph gets a line as a bottom border.
如果在 Writer 文本文档中键入三个或更多连字符以开始新的一行，然后按 Enter 键，则会删除这些字符，并为上一个段落添加一个下边框。