why can't I see the effect button on the masking tool brush?

I have masking tools. when i try to use them i cant due to when i got to masking, click on Brush there is no effect button for me to click on. some please help me. i dont know why i cant just contact customer support and talk to a real person about this issue and get it solved. but no we have to post here and hope someone gives the right adive in a decent amount of time.