在文本的显示中， 换行 （line wrap）是指文本在一行已满的情况下转到新行，使得每一行都能在窗口范围看到，不需要任何水平的滚动。

自动换行 （word wrap）是大多数文本编辑器、文字处理器、和网页浏览器的一个附加功能。它用于在行间或一行里的单词间隔处分行，不考虑一个单词超过一行长度的情况。

它通常是在看文档或打印的时候实时完成的，所以没有储存或手动插入换行代码。如果用户改变了文档的边缘，编辑器就会自动重排换行符的位置，保证全部文本都处于可见状态，或者给打字员提供一些便捷的方式重排换行符。

软回车是由于自动换行形成的回车，而硬回车则用于另起一段。

Line breaking, also known as word wrapping, is the process of breaking a section of text into lines such that it will fit in the available width of a page, window or other display area. In text display, line wrap is the feature of continuing on a new line when a line is full, such that each line fits in the viewable window, allowing text to be read from top to bottom without any horizontal scrolling. Word wrap is the additional feature of most text editors, word processors, and web browsers, of breaking lines between words rather than within words, when possible. Word wrap makes it unnecessary to hard-code newline delimiters within paragraphs, and allows the display of text to adapt flexibly and dynamically to displays of varying sizes.