A viewport displays a portion of content that is larger than the viewport. Within this viewport pan grip controls are displayed. The pan grip controls are active zones in the viewport receptive to user input and may have a graphical representation. They are presented at positions relative to the content as displayed in the viewport, and in some embodiments, in a predetermined, regular pattern that is independent of the displayed content. The viewport is panned in response to panning input received on the pan grip controls. The panning input may be a dragging of a pan grip control. The pan grip controls maintain their positions relative to the content as displayed in the viewport. Non-panning input on the displayed content is received outside of the pan grip controls.