So I had my lower third all working in my video, opened it up to look at it, now this happens, it was perfect before, now this, half the screen is good, other half has reverted back to green screen. Any ideas? Movie Studio 14 Platinum 14
Try deactivating the Split Screen button. It's at the top of your preview pane fourth from the left. Currently in your image you have it activated. Due to the pathetic black highlighting against a dark grey background it is easy to accidentally switch it on and not realise.