This is a demonstration of a das2 axis. Try dragging the mouse on the axis to zoom in, and right click on it to go back to the previous state. This horizontal axis has scan buttons that pop up when you hover to the left or right of the axis labels. Try right-clicking on the axis, select "properties", and on the properties sheet change the minimum, and then apply changes. Notice with the properties editor you can change the axis label, tell it to animate state changes, and make other configuration changes. All das2 objects have a set of properties they can expose. Last, try clicking on the axis, and dragging left a few pixels until a left arrow appears. Release the mouse, and the axis will go to its last state. This is called a mouse gesture and this one triggers the "back" action. Dragging to the right is the "forward" gesture, and dragging down is the "zoom out" gesture which zooms out by a factor of three.