The touch screen can be used to conveniently set 
the horizontal scale of the displayed waveforms. 
To set other horizontal scale options, see page 60.  
Pinch in/out horizontally to set the horizontal 
scale of the display. 
A scale indicator will popup to show the current 
scale in relation to full horizontal scale range. 
When the scale indicator appears, simply tapping 
the left or right-half of the screen will also change 
the horizontal scale. 
The horizontal scale (as a value) is shown in the 
bottom left-hand side of the display.