TS_FirstAuto
This is a Data Header variable.
Type = Boolean
If TS Technical Specification_FirstAuto is true, the first scan (at the top of the spectrogram) is the last scan in the spectrogram minus the height of the spectrogram (i.e. show the end of the spectrogram). If TS_FirstAuto is false, TS_First determines the first shown scan in the spectrogram.