Number and factors: allow you to select numbers and factors. For example if you want to practice multiplication tables of 17,18 and 19 then select only those here
Random numbers: if you want random multiplication numbers in practice and test mode then select it. If you want numbers to appear in serial order then unselect it.
Reset: resets your number and factors selection.
Test duration: change test duration in increment of 15 seconds.
Show multiple choice: if you want multiple choice answers in test mode then select it. If you want number pad then unselect it.
Repeat Incorrect answer settings: when you answer incorrectly this setting control how often you want that incorrect answer to appear in practice mode. This allows you to practice incorrect answers more often.