What is tweaking, and how do you do it?
Tweaking is a slang term for "making adjustments". In Flight Simulator, it's the adjustment of different settings such as auto gen, scenery complexity, percent of complex clouds and so forth. These settings are found in the Settings menu. Some setting are more important than others, some settings affect program performance. The adjusting of these setting to your individual computer and taste is called tweaking.
'tweaking' is what 'tweakers' use there computers for. It's sort of like adding fuel booster to your engine
I know people who spend thousands on a computer for the sake of 'tweaking' it and testing it is working as fast as it should.....'tweaking' a computer is an addiction to some people