Thanks you, I got the extent numbers I needed. I guess I should try to explain what I am trying to do. I have created a grid with a data frame. The grid is for a specific area and the blocks are a certain size, 20 across and 14 down. I have tried using Datadriven pages to create my grid, that didn't work. Now I am trying to use Fishnet to create my grid. I can get my grid the right size, but it won't come in at the same location as the "frame" grid. I am at a loss of what to do, I have tried different things. I have used the "Identify" tool at the bottom left hand corner of the frame to get my X and Y origin cooridinates.