Problem resolved and I am a bit embarrassed! I changed the probe on channel B, while looking at the data from channel A. Did not notice there were two similar icons on the toolbar.

Regards and thanks.

I am having trouble with the most basic aspect of custom probes. I am even having trouble getting the "built-in" probes to work as expected. Using PicoScope 6.2.2.12 in demo mode, by selecting different "built-in" probes I expect the display output to change. I see no differenves after the change. I...