Adobe Photoshop CC 2014 v.14.xx - Manual (Page 414)

Note:
To the top
A higher cache level setting will increase the redraw speed for large, multi-layer files, but requires additional usage of system RAM. If RAM
is limited or you work mainly with smaller images, use lower cache level settings
To refresh the histogram so that it displays all of the pixels of the original image in its current state, do one of the following:
Double-click anywhere in the histogram.
Click the Cached Data Warning icon .
Click the Uncached Refresh button .
Choose Uncached Refresh from the Histogram panel menu.
For information about cache level, see Histogram panel overview .
View color values in an image
You can use the Info panel to see the color value of pixels as you make color corrections. When you work with the Properties panel (CC, CS6) or
the Adjustments panel (CS5), the Info panel displays two sets of color values for the pixels under the pointer. The value in the left column is the
original color value. The value in the right column is the color value after the adjustment is made.
Using Levels and Info panel to neutralize the tone of an image
You can view the color of a single location using the Eyedropper tool . You can also use up to four Color Samplers to display color
information for one or more locations in the image. These samplers are saved in the image, so you can refer to them repeatedly as you work, even
if you close and reopen the image.
Color samplers and Info panel
1. Choose Window > Info to open the Info panel.
2. Select (then Shift-click) the Eyedropper tool or Color Sampler tool , and if necessary, choose a sample size in the options bar. Point
Sample reads the value of a single pixel, other options read the average of a pixel area.
407