I guess he was asking without any particular coin in mind. QT wallet is a common wallet for tons of altcoins so understanding its confid helps a lot, where to find this info is a question though...
Yes, that's exactly what I mean. I found brief descriptions for most config lines but no place to learn what and how it affects if you, for instance, change the value of -xxx parameter. Like what happens if you change something that sets min block size etc.