Because the printing process ensured that the same information fell on the same pages, page numbering, tables of contents, and indices became common, though they previously had not been unknown.
Karena proses mencetak menjamin bahwa informasi yang sama jatuh pada halaman yang sama, halaman yang diberi nomor, daftar isi, dan indeks menjadi biasa, meskipun mereka dulunya belum dikenal.