[JRutledge]

If you are suggesting that is there an actual mechanic when a loose ball takes place to move off the baseline, well no there is not. But that does not mean that you could not adjust your position to get a better look in that situation. It probably was the only way this official could determine who had the ball and to prevent further unnecessary physical action. And just because the ball might head to the baseline does not mean he would not be able to see it if he came off the baseline.

Peace