Sony DCR-TRV39 - Manual (Page 143)

5-1-2 Layout Environment
Task panel
Create New button Click to create a new layout.
Orientation button
Click to change the orientation (horizontal/vertical positioning) of
the current layout.
Background Color button Click to change the background color.
Overlap Order button Click to change the order of the selected overlapping objects.
Alignment button Click to line up selected objects in relation to one another.
Group button
Click to work with the selected objects while maintaining their
position with one another. When a group is already set, clicking
this button will release them from the group.
Lock button Click to lock or unlock the position of the selected object(s).