Canon PIXMA MG4200 Series On-Screen Manual page 227

Note
You can also select and correct multiple images.
4.
Click Noise Reduction or Enhance Resolution according to purpose.
The image is corrected, and the
Note
Click Undo to undo the correction.
5.
Click Close.
The Video Frame Capture view reappears.
(Correction) mark appears on the upper right of the image.