What You See Is What You Get Meaning

(idiomatic, computing) The screen image resembles the printed output.

Example: The image corresponds to the reality.
1970, Tim Rice, Jesus Christ Superstar
  What you see is what you get. No one's been disappointed yet.
1992, Rudolf M. Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, page vii
  With fresh material, taxonomic conclusions are leavened by recognition that the material examined reflects the site it occupied; a herbarium packet gives one only a small fraction of the data desirable for sound conclusions. Herbarium material does not, indeed, allow one to extrapolate safely: what you see is what you get […]
1983, Byte‎, volume 8, page 86:
  For:Word, like Wang's editing system, is an early approach to a what-you-see-is-what-you-get word processor.