index (superscript). For example: on a guitar, VII4 indicates a barre on the 7th fret over the highest four strings (D, G, B, and E). There is no rule for whether to write full barre chords with indices (e.g., "6" for a standard guitar) or without. It is a matter of the editor's personal taste. It is customary to place the barre sign above the staff, with a spanning line to mark duration. The barre is often signed on tablature as "C" with the fret number as Roman numeral, such as CVII CVIII CXII CII E--------7--------8--------13-------2------- B--------9--------8--------15-------4------- G--------9--------8--------14-------2------- D--------9--------10-------12-------4------- A--------7--------10-------12-------2------- E--------7--------8--------12-------2------- E Cm Dm B7 See also Slide guitar Thumb position References External links Guitar chords Guitar performance techniques