It doesn't matter whether your sensor bar is exactly at the center of your TV, unless you plan on playing arcade shooters with 1:1 calibration. For cursor purposes, it doesn't matter. What matters, though, is the sensivity and noise. Go to options, sensor bar, "sensivity". You will see two bright dots. Those are the three IR LEDs on each side of your sensor bar. Point the Wiimote at the center of the TV in a way that you're comfortable with (not "arm stretched out"), and then move the sensor bar until the two dots are in the middle of your TV image. There should only be two dots, and they should flicker slightly. If there are any more dots in the area you will move the Wiimote around in (try it out), then that's noise that confuses the 'motes IR camera and should be done away with. Either look for causes (reflections, IR sources, bright sunlight) or adjust the sensitivity of the camera with the slider until only the two dots are visible.
That way your sensor bar should be placed and calibrated as good as it can be.
Personally I found that sensor bar placement above the TV works better than below, because most of the time you'll be using the 'mote from your lap, pointing up, which is more comfortable with the sensor bar placed on top, plus there are significantly fewer cases of noise and obstruction if the sensor bar is not placed at table / tv foot level.
Unfortunatly, not all games offer calibration screens (like FPS/on-rails games) or height adjustments (like Zelda has).
Edited 4 months, 3 weeks ago