Hello, I'm trying to put together four very large layers and size them to a much smaller area. And of course each layer is in a different GCS. And they are a combination of polylines and one polygon oh and one point file. I've tried layering them together as individual clips the size of the county I'm working in but I need to reduce them to a smaller than county area. I've tried editing and always get the error about layers not being the same as my data frame. I've done so many different computations that I am thoroughly lost and can't even remember how I've done what I've done! Can you tell I'm a newbie?! Oh, I have also tried projecting all the different layers using the same projection and changing GCS but I still get the same error about layers not matching data frame (yes, I worked with my data frame GCS of WGS 1984 (the first layer added set it). So, I would like to start all over with advice - what steps should I take to add layers and what tools should I be using to clip/edit this down to an area I can use? Is there a tutorial out there or step by step instructions?