Before moving from Lightroom, I created temporary Hierarchical Keywords to identify each of my Lightroom Collections. For Example...
Collection Fine Art -> Photographic Abstract
Collection Fine Art -> Triptych Art
Website -> About Page
Website -> Contact Page
Website -> Triptych Images
In PMP, I then Filtered by Keyword and created a corresponding Collection. Job done! Except I can't find a way to remove those temporary keywords. In Lightroom, I would have right clicked in the Keyword List and selected Delete, but in PMP it's not that simple.
So the question is: How can I remove a keyword from a selection?