Use the built-in help system EN 6 Use the built-in help system To get help information for any front panel keys or menu soft keys, first press [?] on the front panel, then press the key you need to get help. If there is an index for another topic in the content view, the user can turn the knob to select a different index, press the knob to access the corresponding topic. Press [?] again to exit. Copyright © Qingdao Hantek Electronics Co., LTD HDG3000C Quick Guide 13