Sony A900 - Manual (Page 93)

Using the
vi
ewing function
93
A histogram is the luminance distribution that shows how many pixels of a
particular brightness exist in the picture.
To return to the normal playback screen
Press the
button again.
How to check the histogram
Displaying the histogram
Press the button.
The histogram and recording data of the
displayed image are displayed.
button
When the image has a bright or dark area
portion, that portion is flashed on the
histogram display (Luminance limit
warning). Luminance
B (Blue)
R (Red)
G (Green)
Flashing