Subject:   -65- Is there a way to switch between single and double
                buffering within a GL widget on the fly?
Date: 10 Jun 1993 00:00:01 EST

  There is no way to switch between single and double buffered mode
  within the same window. (In X, this would mean changing the depth,
  which is not allowed.)

  To simulate this, you can create two GL widgets: a double buffered GL
  widget and a single buffered GL widget.  When it is time to change
  the buffering mode, restack the windows so that the appropriate one
  is on top. If the two windows are created with a common parent, they
  move together when the parent is moved.

  For non-mixed mode applications, the GL performs this switching when
  you call gconfig().