The diagrams below show the changes in a library from 1975 to the present.Provide an overview of the information by identifying and describing the key details, and include comparisons where appropriate.

The maps depict a library in 1975 and its current floor plan. Overall, the changes to the library can be characterized by the addition and removal of certain features. In the top half of the library, from left to right, stood the books and magazines shelves, the entranceway with stair access, and another two shelves […]