This document provides information about subtitles, including what they are, common file extensions, formatting conventions, and ways to create subtitles. Subtitles display written text at the bottom of the screen to translate or describe audio content. Common file extensions for subtitles are .SRT, .SUB, and .TXT. Formatting conventions specify the number of characters per line, line length, minimum and maximum display times. Subtitles can be created using a basic text editor and .TXT file or specialized subtitle editor software for more control and formatting options.