zField = new JTextField(""+z, (""+sizeZ).length());
zField = new JTextField(""+z, (""+maxZ).length());
	private void initTextField(int sizeZ, int z)	{		zField = new JTextField(""+z, (""+sizeZ).length());		zField.setForeground(NavigationPalette.STEELBLUE);		zField.setToolTipText("Enter a Z point");	}