This issue has bugged me ever since the expand/collapse triangle (present in PL3) was removed in PL4.
In PL4, a tool would sometimes refuse to expand or collapse on first mouse click but, eventually, sometimes after several attempts, succeed.
I PL5, this now seems to be more reliable, but still not all the time and I think I have found the reason for failure - clicking on the tool label to collapse doesn’t work but clicking on the title bar next to it does.
Can anyone else confirm this?
Better still, what was wrong with the little triangle, which made it clear what was available and why can’t we have it back?