Canon FS 3.6 - Manual (Page 90)

90
Editing
Original Invert Effect
● Inverting an Image
With the image type set to black and white, 8-bit grayscale or 24-bit color, use the
invert effect to transform a positive into a negative or vice versa.
Procedures
Click the [Effect] menu and select [Invert].
The preview image will transform into the opposite state, positive or
negative.
• Inverting an image a second time restores it to its original state.