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X-Axis eXpand Max and Min
These values may be set manually from this dialog, even when eXpand is off.
They may be scrolled by the horizontal arrow buttons at the left and right ends of the X axis, again even if the X-Axis dialog is not visible. This will also force eXpand on.
They may be changed by dragging the X axis with the mouse, as noted under X-Axis eXpand, again forcing eXpand on, regardless of whether the X-Axis dialog is visible.
There are separate Max and Min limits for waveform, Histogram, and Spectrum modes, as well as for X-log Spectrum. The units to the right of these controls change as appropriate for the current X axis.
Spectrogram and Spectrogram Pitch Track also have separate Max and Min eXpand limits, but here they refer to the Y axis, which may also be dragged to force eXpand on and change the limits. (The same little horizontal arrow buttons at either end of the X axis will also work to adjust the Y axis of the Sgram.) The eXpand controls are duplicated in the Spectrogram / Pitch Track Control dialog for convenience.
Note that the units used for setting Max and Min are determined by the current mode: seconds for waveform mode, volts (or User Units, if active) for Histogram mode, or hertz for linear or X-log Spectrum modes. Be sure to set the desired mode before you use either of these commands.
XpandMax=10m will set the Max limit to 10 msec in waveform mode. In Histogram mode this will set 10 mV or 0.010 User Units. In Spectrum modes it will attempt to set 0.010 hertz. XpandMin works similarly.
Alternatively, XpandMax=>1 will increment and XpandMax=>-1 will decrement the current setting by one step. In waveform mode the step size is the reciprocal of the sample rate, or about 21 microseconds at 48000 hertz. In Histogram mode, it is 1/256 of the full-scale range. In Spectrum modes it is one spectral line, or about 46.875 hertz at 48000 Hz sample rate.
You can also use XpandMax#N=UX to set the Max limit in waveform mode to UX samples, up to the display width of 1023. XpandMin#N works similarly for the Min limit. This allows setting a fixed fraction of the full-scale display width, regardless of the sample rate.
In Spectrum modes, XpandMax#N and XpandMin#N set Max and Min in spectral lines from 0 to 511 to cover the full-scale display width.
In Histogram mode, XpandMax#N and XpandMin#N set Max and Min in +/-256 steps over the full-scale display width.
See also X-Axis Control Dialog
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