It lets you modify some console variables easily via interface options up to the real maximum.
e.g. view distance, ground effects and much more
KEYBINDINGS
Keybinding 1
Switch fullscreen / windowed mode
Keybinding 2
Toggle maximized (in windowed mode)
Keybinding 3+4
Change screen display aspect ratio (windowed mode only)
GAME Options
Violence Level
Change blood effects
Screenshot Quality
Compression can be selected to be better quality in a larger file
Screenshot Format
JPEG or TGA
Object Selection Circle
Toggles the targeting circle.
Always Compare Items
Show always a comparison tooltip for Items (without pressing SHIFT-Key).
Ratio
Change Wide-screen display aspect ratio.
Auto Dismount
Land mount: Dismount when trying to use an ability.
Auto Stand
Stand up when trying to use an ability.
Auto Unshift
Unshift/Unstealth/Leave shadowform when using an ability only usable 'unshifted'.
Pitch Limit
"360 degree" will allow you to do loopings with your flying mount.
SYNCHRONIZE Options
Synchronize Settings, Synchronize Config, Synchronize Bindings and Synchronize Macros
Toggles the saving of UI settings, config, bindings and macros to the server.
CAMERA Options
Camera Distance Max and Camera Distance Max Factor
Default maximum is 15, possible values up to 50.
Camera View Blend Style
Camera moves from saved positions smoothly (default) or instantly.
GRAPHIC Options
Farclip
Controls the view distance of the environment.
Texture Cache Size
Caches in memory textures when they are not in use for quick loading.
M2Faster
Level of M2Faster-Optimization.
Groundeffect Density
Density of high quality ground effects (grass, bushes..).
Object Fade
Enable or disable fading of small objects.
Environment Detail
Controls model draw distance for doodads.
Character Ambient
Set the ambient value for characters (lighting).
API
Select which API to use:
CPU Options
Process Affinity Mask
Determines which cores of your processor wow will load & run on.
SOUND Options
Sound Listener at Character
Set sound center to playercharacter or camera.
COLOR Options
Interface Color
Changes the color of the unitframes, mainbar and minimap.
Player Unitframe
Adds the 'rare' or 'elite' dragon around your player frame.