Use the right mouse button or hold the control key and use the left mouse button for panning. Alternatively click and move the blue rectangle in the Outline, which can be shown by clicking on OutlineĀ (Ctrl+Shift+O) in the View menu. Also you can use mousewheel to scroll vertically and shift+mousewheel for horizontal scroll. You can also scroll using the direction arrows if nothing is selected. Otherwise, you move the selection.