Glossary: Pro Glossary

Glossary: Pro Glossary
additive color

Describes the way light waves combine to create color. This is the way humans see things, and it's how most color adjustment happens in Photoshop. This system is called additive because it begins with black (no light). A light source adds wavelengths that have a specific color. Equal amounts of pure red, green, and blue light added together create white. See also subtractive color.

Adobe Camera Raw

Photoshop's RAW file converter. See also RAW.


An unwanted visual distortion introduced by the digital process.

aspect ratio

The relationship of the height of an image to its width. For example, 4 × 5 is the same aspect ratio as 8 × 10.


Occurs when intermediate tones are lost during the digital process. Because these tones are missing, color graduations show as bands rather than gentle tonal grades.

blending mode

Determines how pixels blend with previously existing pixels. Blending modes can be used with some tools, such as the Brush tool, to affect pixel blending for each stroke, or entire layers can be blended with underlying layers by changing the blending mode on the Layers panel.


Adobe Bridge is the file browser that comes with Photoshop. It's named Bridge because it acts as a file browser for all of Adobe's design products.


The process of locally darkening specific regions of an image without affecting the rest of the image. See ...

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