Canon EOS Rebel T6i EF-S 18-55mm IS STM Lens Kit Instruction Manual - Page 195

A Shooting with the LCD Monitor  You can display the histogram by pressing the button. However, the histogram is not displayed while pressing the shutter button completely.  When is displayed in white, it indicates that the Live View image brightness is close to what the captured image will look like.  If is blinking, it indicates that the Live View image is displayed at a brightness that differs from the actual shooting result because of lowor bright-light conditions. However, the actual image recorded will reflect the exposure setting. Note that noise may be more noticeable than the actual image recorded.  If the or shooting mode, Multi Shot Noise Reduction, flash, or bulb exposure is used, the icon and histogram will be grayed out (for your reference). The histogram may not be properly displayed in lowor bright-light conditions. Do not hold the camera in the same position for long periods of time. Even if the camera does not feel too hot, prolonged contact with the same body part may cause skin redness, blistering or low-temperature contact burns. Using a tripod is recommended for people with circulation problems or very sensitive skin, or when using the camera in very hot places. 195