Sorry, just saw that this has been addressed, and I found the new slider. I will check it out!
For further downstream analysis, this job (as of cryoSPARC v3.3) can output particle subsets that correspond to each intermediate reconstruction along one variability component. To enable this functionality, set the parameter Intermediates: output particle subsets to true and select a 3D variability component via the parameter Intermediates: output particle component .