Anyone able to assist with the 401K?

There's two options on the website; "Start Easy Enroll and Start Standard Enroll".. Easy Enroll gives me the option for 8%, 10% and 12%. Standard Enroll seems to be a bit more complex.

Starting Jan 1 2018 the company will match 100% of 3%.. So I would think I should put in 6% but there isn't an option for 6%.

Thanks!