A computer system and method generates one or more commenting features on a canvas, wherein each commenting feature carries at least one comment from a given source. Each commenting feature can include a pin component and a comment body element. The pin component is associated with a corresponding location on the canvas. The computer system and method enable the user to move the comment body element about at least a region of the canvas to view the at least one comment from the given source, while rendering the pin component to coincide with the corresponding associated location of the canvas.