I usually, when using two mics put one on the left channel and the other on the right. Then I duplicate the channels in editing, put one as left only and the other as right only. That way I can edit them separately and combine them when finished.

This time it's not working. Not sure if I have something set wrong, but if I select the channels and right click, the channel selction fields are grayed out, so I can't combine them into mono.

There is something called 'Downmix Output' on the Master output bus, but I'm not sure if this will give me mono for making a DVD.

Any idea?
Dave