I just upgraded to 7.0, and went to change my preview device to my secondary windows display (I've used 6.0 for quite some time and do the same thing.)
When I click the "external monitor" icon, my preview monitor indeeds shows my video, but the other monitor goes black and I can't see the Vegas windows. After searching for help, I couldn't find any topic like this. I also opened up 6.0 and it previews video on the secondary windows display just fine. I compared the settings between 6.0 and 7.0 and didn't see anything unusual.
Any thoughts? Thanks.