Sensing user input to change attributes of rendered content

First content is rendered on a display screen of a computing system according to a first setting for an attribute of the first content. In response to sensing motion proximate to a sensing device, second content is displayed on the display screen according to the first setting for the attribute. The second content is displayed in a window within the first content displayed on the display screen. In response to sensing further motion, the first setting is changed to a second setting, and the second content is displayed in the window according to the second setting for the attribute. In response to sensing cessation of the further motion, the window is closed, the first content is reformatted according to the second setting for the attribute, and at least a portion of the reformatted first content on the display screen.