Canon PIXMA MG4200 Series On-Screen Manual page 388

(3) Operation Buttons
Noise Reduction
Reduces noise (tonal variation that may appear in images taken in dark locations such as night scenes
using a digital camera).
Enhance Resolution
Reduces jaggies (roughness in images).
Undo
Restores the original uncorrected state.
Close
Switches to the Video Frame Capture view.
(Previous Image/Next Image)
Switches the preview display when there are multiple images in the Selected Images area.
(4) Display Size Setting Bar
(Display Correction Screen)
Switches to the preview (correction screen).
(Display Comparison Screen)
Displays the images before and after the correction side by side in preview so that you can compare
them.
Before
Displays the image before correction.
After
Displays the image after correction.
(Whole Image View)
Fits the preview to the area size.