As a follow up thought, I would think this would be a programming nightmare .. It's easy to pull up an external image editor, even something as powerful as Photoshop, do as much as you want to the image and simply save it back as *.jpg, because the image is static. But, video and audio files are dynamic. They are moving, on a time line. And the duration and trim points can be altered. For example, if I trim the audio track in PTE, then right click to bring up my audio "edit" software, the entire audio file will load in my editor. If all I want to do is edit the portion of the trimmed audio, then I have to seek those exact points in my audio editing software, then save the file. I'm talking about doing more here than just adjusting overall tone, etc. I'm talking about adding some effects, etc. But, you would only want the effects to adjust for the specific trimmed portion in my PTE timeline. There is no way for PTE to tell my my audio editing software to show me only the trimmed parts and save that. And even if there was, and at a later place I wanted to extend the trimmed audio track in PTE, the entire audio file would be gone, and I would be left with only the trimmed portion. I guess that sounds a little confusing, and I may not have it right. I use Adobe for video editing, and they have a robust audio editor (Audtion) and a very robust compositing editor (After Effects) that are dynamically linked to the Premier software. But, I know that it took a very long time for Adobe to finally get this mastered. It was something that was requested many years before Adobe finally got it working correctly. If I'm on track about my thinking here, then, as I said, I think it would be a programming nightmare. I haven't tested using an external editor with PTE to see how it works, though. PTE is very robust software but not really designed to be a full spectrum video or audio editing program, or even dynamically linked to external editors this way. It is a quick and feature rich slide show creator. Creating slide shows in Premier is a lot of work. That's why I like PTE. They can be done much faster. And I'm sure there are a lot of users that really don't want to invest the time and energy to overcome the learning curve with full fledged video editing software. That's why they use PTE