i googled it and found it stores 9 settings, it's pretty cool, and for some odd reason boss seems to have discontinued it not long after bringing it out, i got a couple right when they came out a couple years ago i think. now i can't find them. i think they cost around $219 maybe when new? i'm not sure.
i much agree with the recent hc reviewer who says it's dumb you can't scroll thru the 9 patches with footbutton 2, and then click to that setting with button1.
to alleviate that what i did live was just have 2 settings i'd use, and set it manually for one and a patch for the other, and click the footbutton to go between patch and manual.