There is a simple and very flexible way of mixing mono to stereo and anything in between!!
eg: 2x mono [File 1 (L), File 2 (R)]
ADR4:
Edit Panel: Single Channel Edit
Select File 1(L) Check profile settings = Stereo, Select [L] Using end pan handles - pan 100% left
Select File 2(R) Check profile settings = Stereo, Select [R] Using end pan handles - pan 100% right
Mix Panel Check profile settings = Stereo
Drag Files 1 & 2 into separate tracks
It will now not only play in stereo, but each track has the capability of being panned around within the stereo field. This process can be repeated for as many separate mono tracks as you wish.
So if
bydesigndj101 wants to centre the channel from his handheld microphone, he can do it in this mix panel using the L/R end pan handles or add more pan node points to move it around to wherever he wishes.