Sorry I have no idea what this is called but It is driving me mad.
I'm using Vegas pro 17 and when Editing I sometimes accidentally drag the clip causing the timeline to go double and the preview screen to show two screens. In vegas 16 I use to be able to press 5 on the numpad to restore it but this no longer work in 17. What is the key to make this go away or is there a way to disable this feature, I never use it and its incredibly annoying?