9.5.0.0012 Win 10.
After running a Passage Guide set to show Bible commentaries by Priority, I can right click on or near the little triangles to the left of the book cover to bring up a two item menu: "Expand All" and "Collapse All". Only one of the commands is actually available at any given time, and "Collapse All" appears to do nothing, while "Expand All" refreshes the Commentaries section and minimizes any manually expanded previews.
(The behaviour I initially expected in that facet was for "Expand All" and "Collapse All" to expand and collapse the little previews controlled by the little triangles. That would be inconsistent with the use of "Expand All" and "Collapse All" in the other facets, but it is functionality I would appreciate.)
