Zoom H6 - Record Inputs in Stereo
On the Zoom H6, when you normally arm a channel to record, each channel will be recorded to an individual mono file.
However, you can link channels in a stereo pair and record a single stereo file.
To link channels 1&2 and/or 3&4, press and hold one button, then press the other button and the channels will be linked in a stereo pair which you can see on the monitor.
To return to mono channels, repeat the process.