I bought an iRig BlueBoard for controlling loops. I set one pedal to return to the previous mark. However, I have some loops that have smaller loops within them, and if I pass a mark for one of these loops, when I try to return to the beginning of the selected loop, it goes back to the last mark passed, not the beginning of the longer loop I am working on. What command do I need to return to the beginning of the selected loop, not the closest previous mark?