@@robbrown8483 Teachers that come from the school of thought that you should not rest your finger in the soundboard have found that it limits mobility and dexterity. Beginners may find that their right hand is more relaxed and their playing more fluid if they do not rest any fingers on the top of the instrument. You are correct, Carulli recommended resting the pinky on the soundboard just below the highest string in his method, (other methods from that same era did not) and Sor would do it occasionally depending on what he was playing. I Imagine as many teachers will reccomend you don't do it as will reccomend you do. Its usually quite a debate.