Hi, Analog_Joe:
I’ve asked Mike for a change that might get you part way to what you want.
You can copy a Waveform bitmap and insert it into the schematic. The annotation tools there, unfortunately, draw behind the bitmap. I’ve asked Mike to change the order and he sounded agreeable. Fingers crossed.
Of course, that’s imperfect and will have scaling problems. If you need better, see Printing Schematic To SVG -- Solved?
–robert