Manipulating the Scrollbars

  The inner window is moved over the large window through manipulation of the two scrollbars. There are three different ways to effect a change to the window. The first two ways use arrows (one a single arrow and the other a double arrow) located at both ends of either scrollbar, as in Figure 6.1. By clicking with the left mouse button over the single arrow you can move the window by a small amount in the indicated direction. For instance, if you click left once over the single arrow at the top of the left scrollbar, the inner window will move up a small amount relative to the outer window. Thus the contents of the inner window will move down on the screen. You will note that the white square indicator will move upwards on the left scrollbar. The bottom scrollbar will not change. Likewise, clicking left over the double arrow at either end of the scrollbar will move the window by a page i.e., the width or height of the inner window. The ``pagesize'' in this respect will increase or decrease as you resize the window.

 
Figure 6.1: The XGinseng Display window. The scrollbars indicate that the inner window is in the top left corner of the large window. 

The third way to move the window is by dragging the white square indicator along the scrollbar. Click with the left mouse button and hold it down while over the white square. Then, as you move the mouse cursor along the scrollbar, you'll notice a black square attached to the cursor. This black outline indicates where the inner window would be placed if you released the button. The white square remains stationary over the small window's current position. The contents of the Display window will not change until you release the left mouse button. Then the inner window will be moved to that position and the scrollbar will be updated.