Sony TRINITRON KD-34XBR2 Service Manual page 306

Using the DTV Features
Changing the
Picture Size
42
The zoom feature lets you vary the relative size of the left and right
pictures.
1
Activate the picture whose size
you want to change.
2
Move the joystick V to enlarge
the picture.
3
Move the joystick v to make the
picture smaller.
When you adjust the twin screen sizes, the DTV memorizes the
change. The next time you use the Twin View function, the
memorized sizes appear.