In
the Scaling menu click on Autoscale. This automatically adjusts
the vertical scale to place the highest and lowest points of the selected
waveform
at the top and bottom of the waveform window. In other words, this command
automatically scales the waveform to make it as large as possible while
staying within the top and bottom limits of the waveform window. For a
single channel display, this results in the maximum waveform image visible
on screen.
Choose
Scaling Autoscale (ALT, C, A).
This automatically adjusts the vertical scale to place the highest and
lowest points of the selected waveform at the top and bottom of the waveform
window. In other words, this command automatically scales the waveform
to make it as large as possible while staying within the top and bottom
limits of the waveform window. For a single channel display, this results
in the maximum waveform image visible on screen.