how can I search Person1 AND Person2

how can I search Person1 AND Person2

I am still fairly new to Peakto.
I am appreciating it a lot, as it really solves a handful of problems and seems very intelligent.
In light of this, I am a little surprised it´s so hard to find out – as a rather experienced software / DB user – how to do an AND-search for two people (based on face tags, e.g.)

Any help or hints are appreciated (– as I have probably simply overlooked something obvious…)!