In SmartSDR for Windows, how about a one-press button to swap slices?

Loggers, RTTY programs, the list goes on. It is unrealistic to expect a tenth of them to support slices. But they all support dual vfos. We already have half assed vfo emulation because my logger thinks slice a is my a vfo and it doesn't seem to even grasp that slice b ought to be vfo b.

I am not sure what you are looking for, but DDUTIL can provide that function with the 'slice' button that is located under Annunciators.