To find an alphabetic map key and aid in location of a particular cemetery:
Click on opened rectangle on top right hand corner of map. This will open a larger map. On the left hand side of the larger map is an alphabetic menu beginning with Aiguier Cemeter and four other cemeteries beginning with the letter A. Below those listings it says 99 more. Click on 99 more and it opens the full alphabetic listings.
So for example if you are looking for Irons Cemetery which is number 39, clicking on Irons Cemetery in the menu moves it to the center of the page and puts a halo around the number 39.