When I am in a drawing and trying to dimension, add notes or balloons, edges from parts behind what I'm dimenion to are showing up and making it difficult for me to be accurate unless I zoom in really tight to select the edge that I need. I have attached an image to show the issue I'm having. The lines that are red are edges behind a top panel that I am trying to dimension. The red lines are coming up when I move my mouse over the assembly. I also have this problem when trying to dimension or add a note/balloon to a sheet metal part. It keeps wanting to select a tangent line on the inside of the part or the inner surface edge unless I zoom in tight to make sure I get the correct edge. Is there a setting somewhere that I need to check? I haven't been able to find anyting.