The foliation for this file follows that given by a modern hand in the top right corner of the recto sides of the folios. This foliation begins in the manuscript with the chants for Advent. In the manuscript, the 102nd folio is labelled 101a, and the remaining folios are numbered 102, 103 etc. For sorting purposes, folio 101a is designated 101w in the index and its verso side, 101x. The subsequent folios are numbered as in the manuscript.
There are a number of changes of hand towards the end of the manuscript. Discernable changes of hand occur at the beginning of ff. 223r, 228r, 232r, 242r, 244r, 249r and 249v and partway down ff. 237r and 248v.
The differentiae of each mode have been numbered with a two-digit system: an upper-case letter indicating the final pitch of the differentia and a sequentially ordered numeral.