This addon has no in-game settings at the moment. I am currently only interested in assuring the core functionality is correct.
When you enter an instance(dungeon) that is for a PVE group, Raid or PVP group this addon will set almost all graphics settings to the "low" settings.
When you are again in the "normal" world your settings will go back to their ultra settings.
There is a small arrow currently anchored to the side of the minimap title bar. It points up and is colored red when the addon has the graphics set high and points down and is colored green when the addon has set the graphics on low.
Currenlty the settings can only be changed in the LUA file.
Future Plans
In game settings on the blizzard addon menu with most likely drop downs to select low medium high or ultra for the low and then high settings used.
Hopefully Blizzard will fix the ability to call the spell graphics particle density from an addon and then it will also be included.
Background
Years ago my computer could barely play WoW and I used an addon that did this. I have a friend in need of that functionality so I went looking for that old mod. I only found caelUI, gfxToggle, gfxToggle 2 and gfxToggle 2 (Fan Update).
None of them are exactly what I am looking for so I went ahead and put this together.