To Use the Built-in Help System 
 
The help system of this oscilloscope provides instructions for all the function 
keys (including the menu keys) on the front panel. Press Help to open the help 
interface. Press it again to close the interface. The help interface mainly 
consists of two sections. The left section is "Help Options", and you can select 
the "Button" or "Index" tab. The right section is "Help Display Area", which 
displays the help information. 
 
 
 
 
 
Figure 10 Help Information 
 
Button: 
By default, the "Button" tab is selected. Under the tab, you can view the 
corresponding help information in the "Help Display Area" by pressing the keys 
or menu softkeys (except the Power key 
, the multi-function knob  , and 
the Page Up/Down key 
/ ) on the front panel directly or rotating the 
multi-function knob   to select the desired key name (the item currently 
selected is displayed with brown shading) in the "Help Options" area and then 
pressing down the knob. 
To switch to the Index tab, use the multi-function knob 
 to select "To 
Index" and then press down the knob.