Scrollbars
Scrollbars offer a convenience to change the values of the textboxes and at the same time to show by gradient what the change affects. The option Connect Channels must be activated for it. The service succeeds with the left mouse button or mouse wheel. After the release of both mouse buttons the focus will be set into the matching textbox automatically. From there the scrollbars can be served with the direction keys indirectly. In combination with Shift key the values will be changed in ten steps.