The plot coordinate matching option is now switched on by default. This option matches different spectral coordinates between spectra plotted together (wavelength, frequency, velocity and energy). To restore the old behaviour (which is quicker for spectra which are all in the same coordinates) just switch this off in any plot window, as the preference is preserved between sessions. Previously users of SPLAT will retain their existing preference.
It is now possible to select redshift, a relativistic velocity and an optical
velocity in the quick change of units associated with a plot.
SPLAT-VO -- A VO-enabled Spectral Analysis Tool