| A | B |
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| anti-aliasing | (A raster-editing feature that softens the hard edges of a selection by adjusting the color of the pixels along the outside edge. |
| background color | The color “behind” a raster image that appears when one erases or cuts a selection from the background layer of an image. |
| background layer | A special kind of layer in raster programs like Photoshop that is always at the bottom of the layer stack and cannot be renamed, moved, deleted, or contain any transparency. |
| contiguous | Linked or touching each other in reference to parts of an image |
| feathering | A raster-editing feature that softens the hard edges of a selection by adding a border along the outer edge that gradually fades into the background, creating a soft blur. |
| flatten | To merge multiple layers into a single layer. Flattening can reduce file size, but should only be done after all editing is complete and is best done on a copy of the original file. |
| foreground color | he color that appears when one paints, draws, or fills an image in a raster-editing program. |
| hand tool | Navigation tool that moves an image around in a viewing area.) highlights (The lightest part of an image, which is usually white. |
| layer mask | A raster-editing feature that enables one to control what is visible on a layer. |
| layers | A raster-editing feature used to layer editable images individually, make changes, add effects, and make nondestructive edits. |
| midtones | The middle range of colors in an image. |
| nondestructive edit | A change made to an image that does not actually alter the original image’s pixels |
| quick masks | A temporary mask used to make or refine a selection. |
| retouch tool | A tool that enables one to alter the content of an image. |
| selection tool | (A type of tool used to select a portion of a raster image before modifying it. |
| shadows | The darkest part of an image, which is usually black. |
| tolerance | A setting that determines the range of pixels affected by a raster editing ool’s action. In Photoshop, this is a setting for the Magic Wand tool. |
| zoom tool | Navigation tool that magnifies or reduces the view of an image. |
