public void specialmark (int i, int j)
	// Emphasize with the SpecialMarker
	{
		Node n = Pos.node();
		String s;
		switch (SpecialMarker)
		{
			case Field.SQUARE:
				s = "SQ";
				break;
			case Field.CIRCLE:
				s = "CR";
				break;
			case Field.TRIANGLE:
				s = "TR";
				break;
			default:
				s = "MA";
				break;
		}
		Action a = new Action(s, Field.string(i, j));
		n.toggleaction(a);
		update(i, j);
	}