A Split Pane allows two smaller areas to be viewed at the same time side by side or above and below. Between the two smaller areas is a separator bar. The separator bar is used to control how much of the viewing area is used for each of the two smaller areas. You can allocate all of the view to one, all to the other, or anywhere in between.
A pane which is split into top and bottom parts has a horizontal separator bar between the two parts; a pane which is split into side by side parts has a vertical separator bar between the two parts. The discussion below about how to control the separator bar assumes a horizontal separator bar which controls the size of the areas above and below. The vertical separator bar works in exactly the same manner, but with "up" and "down" (or "above" and "below" ) replaced by "left" and "right", respectively.
To move the separator bar, move the pointer to the stippled part of the bar, press on the left mouse button, and drag the mouse up or down.
To hide the upper area and show the maximum amount of the lower area, click on the little up-arrow at the left end of the separator bar. This will move the separator bar all the way up. To return to the split configuration showing both areas, click on the little down-arrow at the left end of the separator bar. Similarly, when the display shows both areas, click on the down-arrow to move the separator bar all the way down, hiding the lower area and showing the maximum about of the upper area. Click on the up-arrow to return to the split configuration.
To swap the positions of the upper and lower areas, double-click anywhere on the stippled part of the separator bar.