There are 2 ways to edit the Start and End timecodes on the Subtitle Generator.
1. From the Editor
Click on the Start and End timecodes to the left of the captions.
Enter your new Start and End timecode.
2. From the Timeline
By clicking the on any caption bar in the Timeline, you can shorten or extend it
In addition, you can also move it into a new position
Remember: when you edit the Start or End timecode, the Characters per second (CPS) will also be automatically updated.