2017

Table Of Contents
(a) Current colour balance point (b) Hue shift/saturation comparison (outside ring is Result; inside ring is Source)
(c) Balance tools
Colour balancing is performed in RGB colour space. The luma of the image is not changed. For example, if
Hue (tint) is set to 0 and Gain (strength) is set to 100%, pure red is added to the image. However, a black
pixel remains black since it keeps the same luma value.
To change the colour balance in the image:
1 Enable Regen so that the image will update as you change the colour balance.
2 Select the range you want to modify.
3 On the colour wheel, click and drag toward the colour you want to use.
As you drag the cursor, a colour balance point follows the cursor. Depending on the range you are
modifying, the colour balance points are shaded to make for easier identification (from light grey to
black, in this order: Highlights, Shadows, Midtones, Master).
You can continue dragging outside of the colour wheel. The colour balance point is replaced by a
triangle in the outer circle of the colour wheel. The triangles are also shaded depending on the range
selected (from white to grey, in this order: Master, Highlights, Shadows, Midtones).
The image dynamically updates as you drag.
TIP You can interact directly in the image window to change the colour balance. While holding Alt and
the range keyboard shortcut (V for Master; Z for Shadows; X for Midtones; or C for Highlights), drag directly
in the image window. The colour wheel and Balance Tools fields update accordingly.
4 If you are not satisfied with the resulting image, click and drag the colour balance point or triangle
again. You can continue to move the colour balance point or triangle until the desired effect is achieved.
Adjusting the Colour Range
You can use the Histogram menu to adjust the range of values used for the red, green, blue, or luminance
channels of an image. The histogram shows the colour distribution of pixels in the front and result image
for the selected channel. The horizontal axis represents the values of pixels, from black at the left to white
at the right. The vertical axis represents the number of pixels with these colour values.
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