every year, more editing projects are being done on computer and fewer in print. also, if there is a digital version of a text the copyeditor is editing, they can more easily search words, run spellcheckers, and generate clean copies of messy pages. the first thing copyeditors must do when editing on-screen is to copy the author's files, as the original document must be preserved. each word processing program provides various options for how an editor's markups are shown on screen and on the printout. on-screen editing mainly differs from hard-copy editing in the fact that the copyeditor should edit more cleanly on-screen, refraining from saving parts of words, and be careful in maintaining proper line spacing.