Saving a preset is simple:
Choose which loops you would like to be engaged in your preset. Do so by pressing on switches A to E. If a switch is lit, that particular loop is engaged. In the image above, loops A, C and D are engaged.
Press the Learn button. The Learn button will blink, indicating that the ML5 is in Learn mode.
Send a Program Change message of your choice from your midi controller. The Learn button will flash quickly, indicating that your preset has been saved. The selected loops will be engaged every time the ML5 receives the chosen PC message.