Adobe Acrobat: Suite of applications to create
and view PDF files.
Adobe Illustrator file format (.AI
files): AI was developed by Adobe Systems for
the Windows and Macintosh platforms. It is primarily
vector based although later versions, such as versions
6.0 and 7.0, support bitmap information.
Adobe Photo file format (PSD.files): The
PSD file format (.psd files) is the native bitmap
file format for Adobe Photoshop.
Aliasing: The term is commonly applied to
spatial aliasing, which manifests as visible pixelation
- a blocky or jagged effect - especially with near
horizontal or near vertical lines of high contrast.
Arrow keys: Direction keys that move or
"nudge" selected objects in small increments.
You can also use Arrow keys to position the cursor
when you type or edit text onscreen or in a dialog
Aspect Ratio: The ratio of the width of
an image to its height (expressed mathematically
as x:y). For example, the aspect ratio of an image
that is 640 x 480 pixels is 4:3.
Anti-aliasing: You can change the on-screen
appearance of text by smoothing the font edges.
Anti-aliasing fills jagged pixels with intermediate
color or shades of gray to increase clarity. The
effect is easier to view on large fonts or by zooming
in on the text.
Anti-alias: The blending of pixel colors
on the perimeter of hard-edged shapes, like type,
to smooth undesirable edges (jaggies).
AutoCAD Drawing Database (.dwg files): are
vector files used as a native format for AutoCAD
Animated Gif: The Graphic Interchange Format
(.gif files), developed by CompuServe Inc., is a
bitmap-based format designed for use on the World
Wide Web. It is highly compressed to minimize file
transfer time and supports images with 256 colors
or fewer. The GIF format provides the ability to
store multiple bitmaps in a file. When the multiple
images are displayed in rapid succession, the file
is called an animated .gif file.
Anchor Point: The point that remains stationary
when you stretch, scale, mirror, or skew an object.
Anchor points correspond to the eight handles that
display when an object is selected.
Alpha channel: A special 8-bit grayscale
channel that is used for saving a selection.
Alley: The space between columns within
a page. Not to be confused with the gutter, which
is the combination of the inside margins of two
Ascender: In typography, the parts of lowercase
letters that rise above the x-height of the font,
e.g. b, d, f, h, k, I, and t.
back to top