Sony DCR-TRV39 - Manual (Page 199)

6-6 Mask Mode (Windows Only)
Masks allow you to apply certain limitations to the appearance of pictures by using stencils, changing the
opacity (transparency) of the image, etc.
This mode is not available when opening the Image Editor from the Album Environment.
Gradation mask Click to display a list of available gradation masks.
Stencil mask Click to display a list of available stencil masks.
Drawn mask Click to create a custom mask.
Gradation masks
Gradation masks
Available gradation masks are listed here.
[OK] button
Click to apply the selected gradation mask.