Use capture mode when you want to code a live video feed in your capture movie window.
Set up your capture, open your code window, then click Capture mode.
If you’d like to code your timeline based on the timeline movie window, use code mode.
Activate a code button.
Deactivate your code button when appropriate. The instance created will be at the end of your timeline.
Capture mode will always add instances to the end of timelines because it’s based on a live video feed.