Sony DCR-TRV39 - Manual (Page 114)

4-3 Media Selection Panel
Create new project
While the media stream is being edited and before it is saved as an MPEG1 file, it exists as a project.
Saved projects (which have not yet been formatted as MPEG1 files) are called project files.
Open a project file
Clicking this button displays the 'Open' dialog box, allowing you to browse the folders on your
computer.
Save project
Clicking this button displays the 'Save As' dialog box. Enter the file name and click [Save] once you
have defined a location on your computer where you would like the project to be stored.
Movie display button