With this option activated 3DTitles will automatically skip through the parts of the video with no subtitles during the playback. This allows you to save significant time by skipping the parts where there are no conversations and, respectively, subtitles. Combined with the ability to play at 1.5x or 2x speed and keep the speech understandable this could prove a very powerful tool.
The Preview Subtitles option can be switched on/off by pressing the F5 keyboard button. A small indicator 
appears in the upper right corner of the video window.
There are several parameters which can be adjusted by using File/Preferences menu.
Jump if gap is greater |
The program will skip the video between the titles if the gap between them is greater than the entered value in seconds. The default is 5 seconds. |
Jump Y frames after subtitle |
The program will play the video Y frames after the current subtitle ends and then will jump on the next subtitle. |
Start Z frames before subtitle |
The program will resume the video Z frames before the next subtitle starts. |