Signature.
The letter or figure in the white line of the first page of a sheet, to guide binder in folding—also used by printers to identify any particular sheet.
· 
· 
Entry taken from Printers' Vocabulary, by Charles Thomas Jacobi, 1888.
The letter or figure in the white line of the first page of a sheet, to guide binder in folding—also used by printers to identify any particular sheet.
· ·
Entry taken from Printers' Vocabulary, by Charles Thomas Jacobi, 1888.