The touch screen can be used to conveniently set 
the vertical scale of the selected waveform. To set 
other vertical scale options, see from page 53 
Pinch in/out vertically to set the vertical scale of 
the selected waveform. 
A scale indicator will popup to show the current 
scale in relation to full vertical scale range. 
When the scale indicator appears, simply tapping 
the upper or lower half of the screen will also 
change the vertical scale. 
The vertical scale (as a value) is shown in the 
bottom left-hand side of the display.