U+FFF9 "" Interlinear Annotation Anchor Unicode Character

U+FFF9 "" Interlinear Annotation Anchor is a specialized formatting character used in digital text to mark the start of an interlinear annotation, which typically pairs inline notes or translations with the main text. It belongs to a set of three characters, along with U+FFFA (Interlinear Annotation Separator) and U+FFFB (Interlinear Annotation Terminator), that together define the boundaries of annotated segments for applications requiring bidirectional or layered text display. While invisible in rendered output under normal conditions, this anchor character enables precise structural markup in scripts used for scholarly editions, language learning materials, or other contexts where additional explanatory content is inserted between lines.