+/**
+ * gtk_aspect_frame_set:
+ * @aspect_frame: a #GtkAspectFrame
+ * @xalign: Horizontal alignment of the child within the allocation of
+ * the #GtkAspectFrame. This ranges from 0.0 (left aligned)
+ * to 1.0 (right aligned)
+ * @yalign: Vertical alignment of the child within the allocation of
+ * the #GtkAspectFrame. This ranges from 0.0 (top aligned)
+ * to 1.0 (bottom aligned)
+ * @ratio: The desired aspect ratio.
+ * @obey_child: If %TRUE, @ratio is ignored, and the aspect
+ * ratio is taken from the requistion of the child.
+ *
+ * Set parameters for an existing #GtkAspectFrame.
+ */