A | B |
Absolute unit | Font size definitions that use one of five standard units of measurement. |
Animated GIF | An image composed of several images that are displayed one after the other. |
Client-side image map | An image map that is stored in an HTML file. |
Color value | A numerical expression that precisely describes a color. |
Dithering | When a browser combines similar colors from its palette to approximate the original color’s appearance. |
Dpi | Dots per inch, a unit of measurement of the resolution of an output device. |
Em unit | A unit of measurement of font size, equal to the width of the capital letter “M.” |
Ex unit | A unit of measurement of font size, equal to the height of the lowercase letter “x.” |
Flash | A proprietary graphics format from Macromedia. |
Generic font | A name for a general description of a font’s appearance. |
GIF | Graphics Interchange Format; a commonly used graphics format on the Web. |
GIF89a | A GIF format that supports interlacing, transparent colors and animation. |
Graphics Interchange Format | GIF. |
Hanging indent | A paragraph format that extends the first line of text to the left of the text block. |
Hexadecimal | A number expressed in base 16, used to express color values. |
Hotspot | A specific area of a graphic that has its own link. |
Image map | A tag that lists the boundaries of all hotspots in a graphic. |
Interlaced GIF | A GIF file that is saved and retrieved in stages. |
Interlacing | The method by which a software product saves and retrieves a GIF image. |
Joint Photographic Experts Group | A graphics file format. |
Kerning | The amount of space between pairs of letters. |
Leading | The amount of space between lines of text. |
Macromedia | Developer of Flash graphics format files. |
Noninterlaced GIF | The process of saving a graphics file one line at a time. |
Palette | A selection of colors. |
Pixel | A unit of measurement that represents a single dot on an output device. |
PNG | Portable Network Graphics, a graphics file format. |
Portable Network Graphics | PNG. |
Progressive JPEG | A JPEG format that creates effects similar to interlacing. |
Relative unit | An expression of font size relative to the size of a standard character. |
RGB triplet | A representation of a color based on the percentages of red, green, and blue. |
Safety palette | A palette of colors that are guaranteed not to dither in any Web browser. |
Scalable | A process that allows a Web page to be rendered the same way, no matter how a user’s output device is configured. |
Scalable Vector Graphics | A graphics file format useful for creating line art. |
Server-side image map | An image map that is stored on a Web server. |
Spacer | A transparent GIF image used as a layout device in earlier HTML files. |
Specific font | A named font, such as Times New Roman, for example, as opposed to a generic font style (serif, for example). |
Splash screen | A Web page that contains links to other pages on the site, but which contains no substantial content of its own. |
SVG | Scalable Vector Graphics. |
Tiling | The process of repeating an image horizontally and vertically until it fills up a page. |
Tracking | The amount of spacing between words. |
Transparent color | A color in a graphics file that is not displayed when the image is viewed in an application. |
Watermark | A fixed background image. |
Web-safe colors | A palette of colors that are guaranteed not to dither in any Web browser. |