As the Lord's Prayer ("Our Father in Heaven, Holy be your Name.....") is the most important of all prayers, it is better if certain body language gestures are observed while making this Prayer.
When ever a devotee is making this Prayer, he/she should be aware that the Lord Jesus is also making this prayer with him/her. So understand the importance of this Prayer, as this is the only Prayer taught by the Divine Master and so Pray with complete confidence and full faith in the Almighty Divine Father as a child asks some thing to its father.
Hence whenever this Prayer is said, remember that we are humbly praying to the Almighty Divine Father who is the Creator and Master of alll...!
It is highly desirable to stand or kneel and stretch and keep both hands open while saying the Lord's Prayer, during Holy Mass, public prayers or during individual personal prayers.