94.4Introduction ofsystem setting interface4.4.1 Recall and store:it can recall and store current waveform parameter to the specific place, rotate knob to thespecific place. When you want to recall, store and delate, press corresponding softkey.4.4.2 Sync: When sync, CH1 is the object of operation. CH2 parameter will be changed with the changes of CH1parameter. When the sync item is selected, you can press or knob to select the sync item needed, pressON softkey to select and press OFF softkey to cancel.4.4.3 Other function on system setting interface and other interface operation are similar as above.