Extended settings allows to modify nearly every parameter of the game engine in the same way editing the central configuration file simuconf.tab. Therefore all parameters have exactly the same name as their counterpart in simuconf.tab, where you can also find the documentation of these parameters.
If you modify an existing game, you may need to solve and reload to apply the settings. Some settings (like factory connections) will only affect newly created objects.
You can easily create an unplayable game or make you ruin game.