You can selectively export subtitle text lists by
setting or clearing the check marks in the subtitle ID column.
If you clear all the check marks for the subtitle lists,
you are effectively deleting all subtitle text data from
the original input video.
As indicated in the Subtitle list, Status, and Output columns,
high lighted by the green rectangle, there are three kinds of subtitle lists:
1. subtitles embedded in the input video file, e.g., the first two lists;
2. newly created subtitles by duplicating an input list, e.g., the third list; and
3. newly created free list, e.g., the fourth list.