GtkMisc::set_alignment
void set_alignment(double xalign, double yalign);
set_alignment() sets the
relative positioning of the calling widget within its container.
xalign refers to the relative distance from
the left edge, and yalign to the
relative distance from the top edge of the container, with
0.0 being no distance from those respective edges
and 1.0 being no distance from their opposites.