Sony KDP 65XBR2 - Manual (Page 56)

Using the Projection TV Features
46
Changing the
Picture Size The zoom feature lets you vary the relative size of the left and right
pictures.
When you adjust the twin screen sizes, the projection TV memorizes
the change. The next time you use the Twin View function, the
memorized sizes appear.
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.