I am looking for clarification on different video frame sizes and how they should be edited. I've been using FCS, but I'm learning Premiere Pro CS5.5. I have nearly 50 clips in three different frame sizes and fps: 1920x1280 23.98fps 1280x720 59.98fps 1280x720 29.98fps They're all Apple ProRes 422 (.mov) files. When I create a new project in FCS7 and import them, they all seem to display the same on my workstation. However, when I create a new project in PP and import the same clips, the 1920x1280 display "full-screen" in my sequence, but the 1280x720 clips are shrunk with black borders around them. I think I understand why this is so: the smaller number of pixels across and down the screen are simply doing what they're told and using the number of pixels of information for each frame (or something to that effect). So, why doesn't this happen in FCP7? Is it displaying only part of the larger frame sizes or is it blowing up the smaller frame sizes? And, perhaps more importantly, what are the best practices for handling different frame sizes (and fps) in the two programs? Thanks for any help.