4.  Use the Variable knob to move the 
file cursor up and down.  
Use the Select key to choose a file 
or directory or to set the file path. 
  When a USB flash drive is used, 
the file path is remembered 
each time the USB flash drive is 
used. This saves you the hassle 
of setting the USB file path each 
time the USB flash drive is 
inserted into the scope.