HOW TO STAND AT KIDDUSH LEVANAH
In Shulchan Aruch (O.Ch. 426:2) it says:
"ומישר רגליו ומברך"
to straighten the feet before making the Bracha.
The Ben Ish Chai says that this means that one should stand with the feet together like we do at Shemoneh Esrai and Kedusha.