More or less self-explanatory, isn't it?
No...? You're kidding, right?
Okay, let's say you have a file with three subtitles. The in cues are:
10:28:30:14
10:30:12:08
11:28:05:23
You append another file with the following in cues:
09:01:28:11
10:23:23:00
11:12:13:14
When selecting "Sort by in cue" all the subtitles are... You guessed it... sorted by in cue:
09:01:28:11
10:23:23:00
10:28:30:14
10:30:12:08
11:12:13:14
11:28:05:23
You cannot select a range here. All subtitles are sorted by in cue, so if you only want to sort part of a file, you'll have to do some cutting, pasting, and appending. Uncued subtitles will retain their order and be placed in the end of the file if they weren't there already.