Canon EOS 70DN Basic Instruction Manual page 383

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 wi h the same
body part may cause skin redness, blistering or low-temperature contact
burns. The use of a tripod is recommended for people with circulation
problems or very sensitive skin, or when using the camera in very hot
places.
The histogram can be displayed when [A1: Expo. simulation: Enable]
(p.230) is set.
You can display the electronic level by pressing the <B> button
(p.65). Note that if the AF method is set to [u+Tracking] or the camera
is connected to a TV set with an HDMI cable, the electronic level cannot
be displayed.
When <g> is displayed in white, it indicates that the Live View image
brightness is close to what the captured image will look like.
If <g> is blinking, it indicates that the Live View image is displayed at
a brightness that differs from the actual shooting result because of low-
or bright-light conditions. However, the actual image recorded will reflect
the exposure setting. Note hat noise may be more noticeable than the
actual image recorded.
If the <F> or <G> mode is set, Multi Shot Noise Reduction is set, or
bulb or flash is used, the <g> icon and histogram will be grayed out
(for your reference). The histogram may not be properly displayed in low-
or bright-light conditions.
A Shooting with the LCD Monitor
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