Not sure what you mean by "mistake" I wasn't criticizing you, just never seen anyone abbreviate "which". I've watched all the tutorial vids on Youtube and at delcam.com. I can't remember any "Create" button for a relief. What exactly are you trying to do, maybe it's a nomenclature issue.
Are you just trying to take an image and make a relief? Are you trying to create a dished relief? Do you have some sort of 3D file you are trying to cut out? Do you have a link to the video your are referring to?