2. If the words weren't accurate enough, and you want to fine tune the start or end point, use Finetune.
3. If the goal is to simply adjust slightly the start and end point, use the "start & end" option. You will have two lines on the screen, representing the start and end cut points and 6 seconds before and after them. Moving the bar on the top line will let you fine tune the new start of your video, and the lower line the end.
4. If you want to completely change the start and end, and not just fine tune it, you can use "full video" mode, which behaves like a classic trimmer, using a video time-line.
Any change you make within Finetune will be saved, and be reflected in the words chosen, or the preview when going back to the main wordtrim screen.
Make sure your video is perfect before creating the new copy.
4. Go back to save and click on the Create Copy green button to apply the changes.