It has been quite some time since visiting the forums and trying out new builds. My Canon AE-1P doesn't run Magic Lantern. 
About 5 years ago I had figured out how to use LV and a white balance setting to get a Kelvin and G/M readout near the spot meter square. I know this was an off schedule use of the firmware; but now I have need of it and forgotten how I did it. I even have the old version on a card but couldn't figure it out. My wife would kill me if I drop $5K on a colorimeter!
Help please and thanks.
About 5 years ago I had figured out how to use LV and a white balance setting to get a Kelvin and G/M readout near the spot meter square. I know this was an off schedule use of the firmware; but now I have need of it and forgotten how I did it. I even have the old version on a card but couldn't figure it out. My wife would kill me if I drop $5K on a colorimeter!
Help please and thanks.