Custom white balance

[Bill Lazar]

I am converting one of my Mavic 4 Pros to full spectrum. I will be able to take infrared images with the appropriate filter. On my regular camera, I can take a picture of a grey card to use it for custom white balance when taking iR images, so that I can visualize the result more accurately. I would like to be able to do this on the drone. I see that you can set temperature and tint, but see no way to set a custom white balance. The manual does not even mention white balance. A Google search brings up plenty of instructions saying to use the eyedropper to choose a color from the camera or to choose an image to use for custom white balance. But I see no way to do this.

Does anyone know anything about this?

Thanks.