填空题

Desktop publishing system is a modern publishing system which makes use of computer technology, graphic skills and printing techniques. Upon entering the system, articles or writings go through seven stages to be published.
At the first stage, articles are collected from contributors, either in written form or on a disk. Then the articles which are contributed in written form are typed. After that, the disk is sent to the next stage. The third stage is to design the page frame, where size, number of columns and margins are planned. When the text is placed in the page, it goes to the stage of designing the layout. At this stage illustrations are put in place and most suitable typeface is chosen. Then follows stage five, where articles are printed on the laser printer and passed on to the next stage to be proof-read. After making all corrections, the files are copied onto a disk and sent to printers for publication.
What should he done before, the files are copied onto a disk and sent to primers for publication
______ should he made.