If you know the location by map (Easiest)

From the Website

#1 Log in to BillionGraves

#2 Click Research

#3 Click Cemetery Search

#4 Find the Cemetery Location using the map

#5 Right Click and create a green plus sign for cemetery location

#6 Type in the name of the cemetery in the Add a Cemetery box that will appear

#7 Click Add Boundary to create cemetery boundaries

#8 Click Add Cemetery

Step 2 & 3

Step 4

Step 5 & 6

Boundaries Step 7

Step 8