I have trouble sometimes with dreadnoughts, especially my 12 strrg. I have found 2 ways that help. 1 Cross you legs R over L moves the body towards your fret hand. 2 Use a taller stool and a neck strap, this way the guitar can rest on your leg and mpove the body down. Or try both Whatever you do dont pkay it with your arm hangging over the top of the body above the elwbow. It damages the nerves and slows blood flow.