You can edit text lines and the timing of the subtitles. Just ckick on the line you want to edit and you'll access all properties easily.
It includes a tabbed system to edit several lines at the same time. That feature gives you the possibility to compare two subtitle files.
Gaupol also features a grammar correction tool and text suggestions.
Gaupol is very useful for those users who want to get started in the subtitling world.