On the left page are the second half of the Lanthanides and Actinides, the Rare Earth element of the F-block., and more of the ElementBook key above The D-block at the right is capped with the group names in the colors of the giant letters filling the element databoxes. Both the large element symbol letters in the databoxes and the matching group names must be communicated by a sighted aide to the Braille user.