Just did a bit of research and found that the tooltip shows up once there's a note placed. So I guess you might do well to put a temporary note in place to read the tooltip
which includes pitch, time, velocity, and duration.
I'd still rather see the simple note location before
I started entering notes, though. A simple "Bb 4" that would help to locate the click point. It would really help, especially when the PRV is zoomed out.