Question

I was watching one of the tutorials with Gregor (episode 5) on using drag and drop.   I attempted to combine instruments on a track as shown in the video, but only get the choice to keep or discard, not combine as shown in the video.   In the video the Apple version is shown.

Answer 1

I'm on Win 10.  If I have an instrument track that has an instrument inserted on it and I drag another instrument from the instrument menu onto that track I get this dialog box:

If I choose Combine, it will add the second instrument and automatically create a Multi Instrument and set up the splitter like this so both instruments are audible on the track:

Answer 2

The multi-instrument feature is only available in the Professional edition of the software.  If you are missing this feature you are running the Artist version of Studio One.