Folger Digital Texts use the text of Shakespeare's plays from the Folger Shakespeare Library editions. The editions contain the work of Shakespeare on the right-hand pages, and notes, glosses, and illustrations on the left.
Folger Digital Texts use the same page numbers as the Folger editions. In the editions, the text of the play appears only on the right-hand, odd-numbered pages, so page numbers here are all odd numbers, too.
FTLN stands for Folger Through Line Number. To the right of the play, the lines are numbered in the usual way, starting over with each scene. To the left of the play are numbers that follow a simpler system: Folger Through Line Numbers.
With Folger Through Line Numbers, all of the lines in a play are numbered sequentially, from the first line of a play to the last. This makes it easier and more convenient to find any line.