Making Image Adjustments 37
• Colour Balance: Lets you adjust colour and tonal balance for
general colour correction in the image.
• Replace Colour: Tags one or more ranges of the full colour
spectrum that require adjustment in the image, then apply
variations in hue, saturation, and/or brightness to just those
colour regions (not to be confused with the simpler Replace
Colour Tool).
• Selective Colour: Lets you add or subtract a certain percentage
of cyan, magenta, yellow, and/or black ink for creating effects.
• Channel Mixer: Modifies a colour channel using a mix of the
current colour channels.
• Gradient Map: Lets you remap greyscale (lightness)
information in the image to a selected gradient.
• Lens Filter: Adjusts the colour balance for warming or cooling
down your photos. It digitally mimics the placement of a filter
on the front of your camera lens.
• Black and White: Used for greyscale conversion with
controllable source channel input.
• Threshold: Creates a monochromatic (black and white)
rendering. You can set the threshold, i.e. the lightness or grey
value above which colours are inverted.
• Equalize: Evenly distributes the lightness levels between
existing bottom (darkest) and top (lightest) values.
• Invert: Inverts the colours, giving the effect of a photographic
negative.
• Clarity: Lets you sharpen up your photos using local contrast.
