Some of these settings (such as 16 bit color) are not available in the Wow UI without using an addon like Gfx. Others are available within Video Options but the sliders there don't always support the full value ranges which Gfx supports.
You can modify Settings.lua to suit your own needs. The structure of the file is easy to understand and each setting has an explanatory comment and value range.
How to install Leatrix Gfx
Installing Leatrix Gfx is easy. Just copy it to your addons folder in the usual way. The first time that you log into Wow, it'll ask you to restart. This is required as some video options are only fully loaded at launch.
After you've restarted, you can log into Wow and start playing. If you want to change any of the settings, open Settings.lua with a text editor (no need to close Wow first), change the values, save the file and do a /reloadui. Easy!
To remove Gfx, simply delete the Gfx addon folder and then delete Config.wtf from your WTF folder. This will reset all the graphics and sound settings.
* Updated for Wow 3.1.2.
* Death Knight voice modulation effects disabled by default to increase performance.
* GfxSettings function in Settings.lua has been renamed to LeaGfxSettings. If you have your own Settings.lua file, you'll need to update it accordingly.
* Tidied up the code in Gfx.lua.
* The user defined settings for Gfx are now stored in a separate file called Settings.lua. This was done to make it easier for other people to create their own settings files and be able to import them easily into Gfx. You may also like to have multiple settings files for your own use.
* All of the settings changed by Gfx are copied to the SavedVariables folder for your account. This is a backup reference only, this file is not read by Gfx at all. Gfx updates the file when you reload your UI or log off your character.
* When Gfx detects a change at startup (or after a /reloadui), it will report the change in the chat frame along with the new value.
* The setting for maximum frames per second (maxfps) is now 0 by default. This instructs Wow to use the maximum framerate available. This will help new Gfx users to see the benefits which Gfx offers as soon as it's installed. If you want the best performance for your computer, you should keep this setting at 0. If you prefer a cooler graphics card, you should change it to 30 or 40.
* Gfx will no longer restart the graphics subsystem if no changes have been made to the settings since the last time Wow was launched. If any changes have been made, Gfx will restart the graphics subsystem the next time you login, but it'll warn you first, and it'll do it in the player environment, not during the loading process. If any of the changes requires a full Wow restart, Gfx will prompt you to do so when you login.