Alpine cda9831 headunit setting help!?

Hi, I got this alpine 9831 headunit, and speakers powered by alpine mrvf340 amp, question about the headunit is that I don't know where to set the treble and bass.  I thought most headunit has about something on treble/bass, but the alpine seems to be complicated with the frequency setting.  Is the frequency hpf/lpf used for setting the treble/bass from the headunit? or there's some button can be used to set the bass/treble about alpine headunits!?

You can also choose a "center frequencie" for bass and trebel and boost/cut at what ever frequencie you want.  You really need to keep your ear pealed to set it up the way you like it best since theres like 100 different trebel and 100 different bass settings to cut or boost, , good luck, just call it a new full time job! haha2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.