Alt key

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ALT key

[′ȯlt ′kē]
(computer science)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Alt key

A modifier key on Windows keyboards that is pressed with a letter or digit key to command the computer. For example, holding down the Alt key and pressing F displays the File menu if it is a current option on screen. Pressing Alt-Tab toggles between active windows (see Alt-Tab). See Control key and Command key.
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References in periodicals archive ?
To preview the mask itself, hold down the Alt key while clicking the layer-mask thumbnail.
It's easy to set up your computer so that ordinary windows movement and resizing take place normally, but using the shift, control, or alt keys while moving or resizing windows results in stunning graphics effects.
All you have to do is place your cursor in the paragraph you want to move, hold down both the Shift and Alt keys and press the up arrow to move it up or the down arrow to move it down.