Screen Dims after a few minutes

My screen dims after a few minutes.It is annoying when trying to watch a news segment or DVD.I have went to the energy section and can't find anything to do with Dimming unless I am looking in the wrong section.The only thing I can find are settings adjustments for screen saver and such.
This is my fisrt Mac and I have had it for only 4 days.Yikes!!
I have only seen a couple people post on this subject.I take it that maybe there is no real solution except to take it to Apple.
`

+~ Go into System Preferences open Energy Saver choose Options. Uncheck Automatically reduce the brightness of the display before display sleep. ~+
I don't mind the dimming (except in extended viewing situations), but is the apparent battery-saving effect of the dimming preferable to the presumable wear-&-tear on the screen of the frequent brightness changes that result from having 'automatic dimming' active?
Also, is there a way to put this under real-time control so that you can switch b&f between having/not having automatic dimming without having to keep opening System Prefs. each time?
Thanks.

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