Canon PowerShot S120 Manual (en)

Click the [OK] button.
Adjustment results are applied to the image.
For information on saving adjustment results to images, see 
“Saving Editing Results” 
There may be cases where the subject's outline and any bokeh 
look unnatural, or where an increase in noise or noticeable 
changes in hue or brightness occur.
There may be cases where the border of the selected area in the 
image looks unnatural.
This function cannot be used at the same time as 
"Microadjustment of the position of maximum sharpness and 
resolution using the depth information contained within the Dual 
Pixel RAW file" or "Reposition the viewpoint or foreground bokeh 
for a more pleasing result".