Firstly, I am using picoscope 18.104.22.168 not the latest beta.
Yes, I have tried zooming in and out, but to no avail; I can only see the agregated waveforms (envelopes). When I try to export this aggregated waveform to CSV or Matlab (in the hope of getting the data back) I get empty files. If I try to "save as" a new picoscope file, picoscope just crashes.
I repeated my measurements using "block mode", ie I reset the "slow sampling transition" to 20s so that my 5s recordings were made in full before the screen updated. (this is awkward, because there is less control of sample rate - but it's OK). The files made in this way are totally zoomable and contain the full waveform data.
There seems no reason why waveforms acquired in continuous acquisition (ie slow sampling) mode shouldn't contain the full data - the full data IS displayed on screen at the end of the test, the problems only happen when I try to save the data to file for later analysis.
I have a work around, but it's not one I particularly like. So if you can help it would be appreciated.