I am trying to create a rectangle in ArcGIS Pro (the application) and totally failing. I hesitate to ask here because I know the instructions are online, but please understand that I have been sitting here for two hours reading the instructions, trying and failing, rereading, etc etc in a continuous cycle. All I'm trying to do is clip a bunch of really, really big shapefiles to a rectangle that I have to make. I've opened the create features tab under edit, but it's empty. I don't understand the relationship between feature classes and features. Perhaps I'm wrong but this whole process seems so convoluted that I am just shaking with frustration. If someone could kindly give me a step by step on how to create a rectangle and make it into a layer (I have the clip part under control) it would be so, so appreciated. Thank you so very much for your help, understanding, and patience with an idiot.