Rongnongno wrote:
Nikon D800, D850 and D500 (possibly more)
1 Press the Live View Button
2 Press the Info button (grid appears)
3 Press OK (Exposure Scale appears at the right)
4 Press the Info button (histogram appears)
Please note that when using one of these cameras in the P mode the camera will adjust all the time resulting in possible wear and tear. All the other modes are w/o issue.