stereo vs mono microphone

I am using Djay Pro 2 on my MacBook Pro to record a session.  I’m using a Berringer U-PHORIA UMC204 USB Audio/MIDI Interface to get my microphone into the software.  When I just plug one microphone into it, it records my vocals onto one stero channel, left or right depending on the input I use.

I have a hacky solution. Use two mics (I’m using lav mics). There is no mono output on the Interface. So no option to change it there. Is there a way to do that in Djay PrO?