Change your Mac displays contrast
Something I never really paid much attention to was the software side of my displays contrast, something that you can change by using simple keyboard shortcuts:
Decrease display contrast: Command+Option+Control+,
Increase display contrast: Command+Option+Control+.
The default is set to the lowest level of contrast, and increases will generally wash out screen colors. The ability to change your displays contrast is actually part of the Universal Access utility in Mac OS X and is intended to aid those who are visually impaired in seeing things on the screen.
The screenshot below shows the Chrome browser looking at OS X Daily on the highest contrast:

I like tricks and tips!!
What is good for? making websites unreadeble? Why i need to chane display contrast?
Good trick for who?
(Sorry about my English)
It’s mostly intended towards people with vision problems, but it’s actually useful for reading text in bad lighting situations too (like a laptop out in the sun)
I didn’t understand these shortcut key presses…
Decrease display contrast: Command+Option+Control+,
Increase display contrast: Command+Option+Control+.
is it just me, or are those both the same key presses
one has a . and one has a , at the end
Control+option+command for both but…
Decraese: comma
Increase: period
Thank You for help!!!
does it work for mountain lion also
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