Archive for the ‘Glossary’ Category

File Under: Glossary

Call to Action

Have you ever seen an advertisement that implored you to “Call now!”? Of course you have. Call to action is a term for the copy in an ad that implores the viewer to do something specific in response to the advertisement. “Click here” and its variants are the most popular calls to action in online advertising.

File Under: Glossary


How a web page “degrades” refers to how it will be displayed by older or less popular browsers.

The hope is that the web page will “degrade gracefully,” meaning the images and text will be displayed in roughly the same way across a variety of browsers and platforms. If a designer relies heavily on JavaScript, for example, then the site will not work correctly on older browsers and thus not degrade gracefully. This problem of browsers interpreting web pages differently is one reason why protocol is so important. If everyone agreed on one protocol for using HTML, then it would be considerably easier to control how web pages degrade.

File Under: Glossary


Flatten is a function in image-processing programs, such as Adobe Photoshop, to combine multiple layers into one file.

For example, in order to move the file to another program or save it as a GIF or JPEG, you will have to use the flatten function to combine all layers into one.

File Under: Glossary


If a computer-displayed image is interlaced, then it is rendered in alternating horizontal lines.

For example, browsers display interlaced GIFs in alternating passes, skipping every other line and rendering a kind of blurry image first and then sharpening it on subsequent passes. This is useful if you’d like your viewers to get a general idea of the image while they are downloading it. Interlacing for GIFs was designed to make bigger images quicker to download, but the problem is that an interlaced GIF actually has a larger file size than a non-interlaced GIF, so use this method cautiously.

File Under: Glossary


The Mozilla corporation is an open source group responsible for the Firefox browser and several other free and open source programs.

See [1] for more information.