To help steady the camera while you are shooting, several ingenious devices have evolved.
Although very basic, the trick of hanging a string or chain from beneath the camera, and trapping its lower end under your foot, does give the camera a certain amount of stability as you pull up on it.
Better still, use a monopod. This is a telescopic tube that screws beneath the camera, and serves as a prop. It is simple, lightweight, and cheap; but take care to always keep it upright, to avoid sloping horizons!
Several types of body brace or shoulder harness are available. Here the camera rests on your shoulder, and a brace below is supported on the chest or in a receptacle on your belt. This arrangement ...