Navigation and function keys 4  Principles of operation
DMS Go+ Edition 4 (05/2014) 4-7
4.3 Navigation and function keys
Keypad
The five keys of the keypad next to the display screen 
are used 
● for navigation between and within the function 
groups, 
● for changing settings, and 
● for selecting adjustment values.
If a key is pressed for a longer time, the ad-
justment values change in larger increments. 
The center key of the keypad is normally used for tog-
gling between the display modes Landscape and Por-
trait.
In special contexts, the keys have further functions 
which are described together with the corresponding ac
-
tion in this manual.
Function keys
Apart from the keypad, two groups of keys, including 
two function keys each, are arranged next to the display 
screen (
see Section Overview of operator's controls, 
page 4-2).
The functions of three function keys are context-depen-
dent and change automatically during the operation. 
The current functions are displayed in the top left corner 
of the display screen (
see Section Keypad functions, 
page 4-5).
The function of the function key number 4 is user-as-
signable (see Section Assignment of function key 4, 
page 5-7).
Power key
The key for powering the instrument on and off is locat-
ed on the instrument side, next to the probe connectors.