Restore gamma in video settings after Alt-Tab between game and windows desktop. On some video cards I have used, the gamma was sometimes brighter when returning to the game. Three workarounds: (1) Go to video options in game and move the slider temporarily to the left and back to restore the gamma. (2) Type a script in the chat window to restore the gamma. (3) Or run this addon.

The addon executes a script which can also be entered in the chat window every 2 seconds. The gamma is decreased first to avoid overflow because it would be very rare to find the gamma close to zero.

/script SetGamma(GetGamma()-0.1); SetGamma(GetGamma()+0.1);

Command/Options:
(none)

Install:
Move the files to the game folder, .\World of Warcraft\Interface\AddOns\GammaFix\*.*