Toshiba 43VR9UM Service Manual page 17

Viewpoint of WID (adjustment of horizontal amplitude) .... left and right flags
Left side
Right side
Left flag end
Right flag end
Adjust the WID data so that the number of register flags on the left and
right of Phillips pattern will come to 7 in total when added.
Direction of adjustment: Facing to the east
– 17 –