Anime Tag

The tag {\\an1} is often referred to as an "Anime Notation" tag, and it's used in Advanced Substation Alpha (ASS) formatted subtitle files. It is used for specifying the alignment of the subtitle text on the screen.
For example, {\\an1} represents bottom-left alignment, {\\an2} is bottom-center, and so on. The numbers 1 to 9 specify different placements of the text, primarily used in anime fansubbing to position lyrics, translation notes, and other types of text on the screen.