You can upload your own subtitle file into a subtitle project for further editing and export:
1. At the top of the subtitle editor, click the language list, then click [Upload subtitle file]
2. Upload your SRT / VTT subtitle file, select [Subtitle file], then click [Confirm upload]
3. Once the subtitle file has been uploaded, click the language list again and select the newly uploaded (locally imported) subtitles to display and use them
