( )     Auto Setting4
When this key is pressed, the oscilloscope will automatically adjust the 
vertical scale factor, timebase, and trigger mode according to the input 
signals.
(5).Run/Stop
     Press the key to "run" or "stop" sampling. RUN state is indicated by 
green light. STOP state is indicated by red light.
(6).Single trigger
Press this key to set up single trigger mode.
(7).Correction signal switching
     Long press the key to drive the correction signal to enter or leave the 
channel
(8).Screen copy
    Press this key to quickly copy the screen waveform to the USB storage 
device in BMP bitmap format
(9).Multipurpose Knob
Multipurpose: During menu operations , turn the knob to select submenu, 
then press the knob to confirm the options .
(10).Function Keys
①.          Measure setting key: can set measure source to all parameters, 
     custom parameters and perform measurement statistics, select 
     measurement indicators, etc.
②. Sampling setting key: set up acquisition mode and the storage depth .          
③. Storage interface key: can select different types for storage and          
     waveform, which can be stored internally or through USB device.
④.  Cursor measurement key : can measure waveform’s time and          
     voltage manually with cursor.
⑤. Display setting key : used for the display settings such as display          
      type, format, duration, grid brightness, and waveform brightness.
⑥. The utility key : can be used to choose some less commonly used          
      settings such as self-calibration, system information, language, menu 
      display, waveform recording, pass test, square wave output, frequency 
      meter, system upgrades, backlight brightness, output, etc.
⑦. Press this key to restore to factory default settings.          
⑧. Press this key to open the waveform recording menu.          
UTD2000CEX-II User Manual