So I've been able to combine two different clips shot by two different cameras at different angles at the same time by creating Multicam clip and choose to sync by sound.
However, when I try to edit this multicam clip, it seems that I could only choose to show one camera clip at a time. I want my two clips to show side by side, like
I know to do that in a normally created project, we can just put two clips together in the timeline and edit transformations for both clips from "Transform" in here
But how can I do the similar thing to a multicam clip?