to find a misspelled word in a printed form (80 + pages). It means a reprint.
to find an open quotation mark where there is supposed to be a closed quotation mark in a printed form. It means a reprint.
to find bad kerning in an author’s name in a printed form because I’m using hand set type which doesn’t fit together optically. It means and hour of filing 12 point type and reprinting the form.