Yes, this works perfectly – thank you so much!
And yes, what I was trying to do was to click on a keyword inside the IDE and have it magically pop up the reference page (like I can when I’m online and working in P5, or either on or off line in Processing). This solution is 99% ok, though.
I am immensely grateful to the people who developed both Processing and P5, and made it available to klutzes like me for free. And I vaguely understand how the small differences between them came into being. But boy, are they annoying …