White Balance is a feature that allows you take control of the color temperature of your photo while taking a picture.
Moving the slider to the left will make your image cooler (blue) and to the right will make your image warmer (yellow). You can still opt for auto white balance, and the camera will select the best white balance for the situation that you are in.
Tap on to engage the White Balance control.
Using the slider, you can increase or decrease your color temperature. Based on where you leave the marker, the number equivalent will show for the color temperature. Tapping AUTO will bring you back to automatic White Balance.
Using the slider, you can warm up your image by sliding to the right. Sliding to the left, will cool down your image. Based on where you leave the marker, the Kelvin Scale equivalent will show for the adjustment.