Select the "Package" radio button if you wish to add an exclusion parameter that will prevent a package from being renamed.
Select the "Class" radio button if you wish to add an exclusion parameter that will prevent a class from being renamed.
Select the "Field" radio button if you wish to add an exclusion parameter that will prevent a field from being renamed.
Similarly, select the "Method" radio button if you wish to add an exclusion parameter that will prevent a method from being renamed.
Finally, select the "Class suffix" radio button if you wish to add an exclusion parameter that will preserve a specified class name suffix and "link" the renaming of classes with that suffix to that of classes with names matching the non-suffix part of the name.