Sony DCR-TRV39 - Manual (Page 205)

6-9 Blend Mode (Windows)
This mode is not available when opening the Image Editor from the Album Environment.
Normal Click to display or revert to the unaltered picture.
Multiply
Click to darken the pixels of the foreground image depending on
the color of the background image.
Screen
Click to lighten the pixels of the foreground image depending on
the color of the background image.
Overlay
Multiplies or screens the colors of the foreground image
depending on the color of the background image.
Soft Light
The pixels of the foreground image will be lightened if they are
50% brighter than the pixels of the background image, or darkened
if they are 50% darker than the pixels of the background image.