Dragging the mouse horizontally in blank space adjusts the brightness of the glass control, whose value is reflected in the first text box.
The Fade button causes the glass control to automatically fade in and out, using a timer to adjust the brightness.
Time Interval adjust the interval between timer notifications.
Brightness Interval adjusts the difference in brightness for each timer notification.
Thawed/Frozen changes the freeze state of the timer.
The selection menu and next two text boxes reflect the color depth of the page. The first text box is the value set, and the second is the value used. The glass control only inverts in the Monochrome and 16 color cases.
Hitting any button while the timer is on causes the timer to stop.