Pentax K-R Operating Manual page 32

• Histogram Display
The following histograms can be displayed when playing back still
pictures. The "Brightness histogram" shows the distribution of brightness
and the "RGB histogram" shows the distribution of color intensity. Press
the four-way controller (• v) to switch between "Brightness histogram"
and "RGB histogram".
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•v
1
•v
6 7 8 9 10
Brightness histogram
6 7 8 9 10
RGB histogram
1 Histogram (Brightness) 7 Shutter speed
2 Protect 8 Aperture value
3 Folder number-File number 9 Sensitivity
4 Additionally saving in RAW format 10 DPOF Setting
5 Switch RGB histogram/Brightness 11 Histogram (R)
histogram 12 Histogram (G)
6 File Format 13 Histogram (B)
* Indicator 2 appears only for protected images.
* Indicator 4 appears only when the file format of the last captured image is
JPEG, and its data still remains in the buffer memory. (p.83)
If [Bright/Dark A[ea ] (p.222)of the[l -_1 Playback 1] menu is set to _ (On),
areas affected by bright or dark portions blink (except when in RGB histogram
display and Detailed information display).