This tab contains a list of tweaks that can be activated. You can click on the question mark symbol to bring up a help box describing the selected tweak. With the plus symbol, you can add a tweak to the list of active tweaks and with the minus symbol, it can be removed.

Tweaks can also be added or removed by double-clicking on the entries in the available and active tweak lists respectively.

The dropdown listbox allows to list only the tweaks belonging to a given category.