I have a model that has a depressed area in the middle, so to speak. I want it to be a specific distance from the edge of the object. However, when I use the dimension tool, it will not lock on to the edge(s) only the end points and that is not what I need/want. Any suggestions on how to note this other than a text? I want it to be able to be changeable just like the other dimensions do.
Thanks in advance.