The default setting for WB(B) and WB(R) is 50
If I change WB(B) by a tiny amount the image turns a dirty yellow and setting it back to 50 doesn't return it to normal.
To get something that looks like the original image I have to set WB(B) to about 95
The only way I've found to reset it back to defaults is to switch to preview mode, take an image and then switch back to video.
