There are times that you want to lighten or darken the LCD brightness, and also adjust the Color Temperature of the LCD.
On Page 85 of the PDF manual are the instructions on how to do both.
You go the “Set-Up” menu, and choose the 3rd option (it looks like a monitor with a wedge under it. (Highlighted in yellow below)
From there, you use the 4-way to adjust the LCD.