Logic Extender
The Logic Extender allows adding new columns to the ones already available in the standard modules.
To delete an Extended Logic rule, select the row and press Delete. Alternatively, you can uncheck the "Is Active" column. In this case, the selected rule will be preserved but it will not run.
Any column available within each module's grid (default or added through the Logic Extender) can be used for filtering, grouping, calculated totals, etc.