Improve (or, well, at least arbitrarily change) the descriptions of various settings in the graphics options.

More than a few of these have annoyed me for a while, what with their typos and odd wording and occasional lack of important details.

Criticisms welcome. I mean, as long as it doesn't devolve into MORE bikeshedding. Even I don't enjoy that.
I'll remove the GL part, but I only added it because the actual description of the feature is fucking worthless. Can we expand on it?