Multiple MIDI Transmit Source IDs

Howdy!

On Eos 3.3.0 b549, I am able to set multiple DMX Recieve IDs (eg: from multiple Response Gateways) using the + to delineate, but I am not able to do the same to MIDI TX; this would be helpful to delineate between which devices (each assigned an ID) are being transmit to. 


Thank you!