I use the M key to tap markers in while playing - this to get stuff to the beat. OK .. Now open Edit Details and select SHOW > Markers. Now and as you allow the T/L Cursor to roll, you can HIT the M key and get a NEW line in Edit Details View. OK .. here's the crafty part. You need to return to giving Focus to the Track> ALT+0 does this NOW you can hit M again, get a new line in EDV and TYPE what you want. NEXT hit ALT+0 and back to Track Focus> Now hot M .. go to EDV enter your text .. .and so on and so on.
Having ALT+0 as a Toolbar Icon could help?
Anyways, nice question . . hope this helps. You need to be a bit fast though. Just done this and it is possible.