Glossary
Actual size
Displaying the image on screen so that one pixel in the image exactly matches one pixel on the monitor. This is not the same as print size, which is determined by the resolution of the image.
Adjustment layer
Special layers that perform non-destructive tonal and color adjustments to all or part of the artwork; they can be turned on or off and altered as required.
Aliasing
The opposite of anti-aliasing: no attempt is made at blending elements of the artwork to avoid jagged edges. This does have its uses, for example with very small fonts to avoid them becoming unreadable.
Alignment
A set of tools on the options bar to force multiple layers to line up with each other using edges or centers.
Alpha channel
An area used to store ...
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