Overscan
  autoscroll, 74
  cloning, 59
  coordinate reference, 46
  display clip, 49, 61
  effect on the Viewing Area, 533
  finding display clip, 63
  maximum, 62
  maximum custom value, 62
  preference, 62
  preset values, 62
  QueryOverscan(), 59
  restrictions, 66
  SA_DClip, 49, 62
  SA_Overscan, 49
  screen dimensions, 46
  screen offsets, 46
  standard, 49, 62
  text, 46, 62
  video, 62
  VideoControl(), 63
  ViewPortExtra Structure, 63
  visible area, 63, 86