Fusion Page Resolution

Hi, I have a bunch of 4k footage (shot against greenscreen) that is in a HD timeline. I want to key the footage at a higher resolution (in the fusion tab) than the timeline. Is there an easy way to do this?

After switching to the Fusion tab, pull the footage in again from the Media Pool. You can use a TimeSpeed node line up the clip, with the HD MediaIn to serve as reference. Unfortunately, the metadata sub-view is currently broken, so you may need to do it by eye. Hopefully that will be fixed soon.