Mac as x system preferences for Uni

Mac as x system preferences for Universal Access features, which allow options to
help vision-impaired users to see or hear what is on the screen. Zoom can magnify
the contents of the screen, and the White on Black option gives the display higher
contrast.The system can speak selected text and text underneath the mouse, and
speech recognition allows users to launch applications as well as to execute application
commands by simply speaking. Preferences can be set for many aspects of the
user experience, from screen-saver settings, to the Dock (menu display), to keyboard
and mouse settings.The bottom-left Finder screen allows users to see several levels
of the directory hierarchies.
matted displays, and other visual or auditory tasks. Cognitive theories, involving
short-term, working, and long-term memory, are central to problem solving and
playa key role in understanding productivity as a function of response time
(Chapter 11). However, predicting performance on complex cognitive tasks
(combinations of subtasks) is especially difficult because of the many strategies
that might be employed and the many opportunities for going astray. The ratio
for times to perform complex tasks between novices and experts or between firsttime
and frequent users can be as high as 100 to 1. Actually, the contrast is even