[DG]

I have never pointed to 1st base after a ball four, with either hand. I have told the batter "that was four", if it appeared he did not know already, but have never pointed.

On a check swing I use either hand, whichever is most convenient for the situation, but there is no mistaking a strike since I hammer a strike, I don't point. On a check swing appeal I always step to the side and ask "did he go". So there is no mistaking a check swing appeal. I was taught to hammer and never tried to do anything else.