Has anyone ever told you that you are supposed to put your hand over your heart for the national anthem?

I recently saw once again the whole article and the tape of the incident where Bill Richardson, Hillary Clinton, and several other people stood with their hands on their heart, not facing the flag, not singing, and watching the singer. President Obama was standing there with his hands interlocked below his waste. Bill Richardson did it, Hillary followed suit, the others followed them, Obama wasn't watching them. Being on the end, he was facing the singer with them to his back. He turned and looked after it was over and looked surprised. I would have been, also. The military has different laws and rules but in grammar school we listened and sang along to the national anthem and then said the pledge of allegence at which time we put our hands over our hearts, but not while singing. The tradition is at ball games and public events where the flag is raised, everyone stands and sings while the flag is being raised. When no flag is being raised or saluted, why you you put your hand over your heart? That would be like saluting the singer. I am sure FAUX NEWS and Hillary Clinton saw an opportunity to try to act like that was Obama's mistake. But, when checking with the lady in charge of the national archives she said there is no rule about the national anthem, only the pledge. and they weren't saying that. If they put their hands over their hearts in anticipation of saying the pledge afterwards, I can understand but that is not the traditional law.