Custom Logo Design Glossary
Descender: in typography, the part of the letterform that dips below the baseline; usually refers to lowercase letters and some punctuation, but some typefaces have uppercase letters with descenders.
Desktop : The layer in a drawing where you can experiment and create objects for future use. This layer is outside the borders of the drawing page. You can drag objects from the desktop layer to the drawing page when you decide to use them.
Dingbat typeface: a typeface made up of nonalphabetic marker characters, such as arrows, asterisks, encircled numbers.
Data Exchange File (.dxf files): format is a tagged data representation of the information contained in an AutoCAD drawing file. The DXF file format is a native file format of AutoCAD. It has become a standard for exchanging CAD drawings and is supported by many CAD applications. DXF format is vector based and supports up to 256 colors.
Discretionary hyphen: a hyphen that will occur only if the word appears at the end of a line, not if the word appears in the middle of a line.
Dithering: Changing images to the Paletted color mode lets you use dithering to enhance color information. Dithering places pixels with specific colors or values relative to other pixels of a specific color. The relationship of one colored pixel to another creates the appearance of additional colors that do not exist in the color palette.
You can use two types of dithering: ordered dithering and error diffusion. Ordered dithering approximates color blends using fixed dot patterns; as a result, solid colors are emphasized and edges appear harder. Error diffusion scatters pixels irregularly, making edges and colors softer. Jarvis, Stucki, and Floyd-Steinberg are conversion options that provide error diffusion.
Diacritical mark: An accent mark above, below, or through a written character; for example, the acute (') and grave (`) accents
Display type: large and/or decorative type used for headlines and as graphic elements in display pieces. Common sizes are 14, 18, 24, 30, 36, 48, 60, and 72 point.
Dither: for digital halftones, the creation of a flat bitmap by simply rutning dots off or on. All dots are the same size there are simply more of them in dark areas and fewer of them in light areas -- as opposed to deep bitmaps used in gray-scale images.
Dimension line: A line that displays the size of objects or the distance or angle between objects DPI (dots per inch): the unit of measurement used to describe the resolution of printed output. The most common desktop laser printers output a 300 dpi. Medium-resolution printers output at 600 dpi. Image setters output at 1270-2540 dpi.
Duotone: a halftone image printed with two colors, one dark and the other light. The same photograph is halftoned twice, using the same screen at two different angles combining the two improves the detail and contrast.