I have an assembly that has a couple sub-assemblies in it. On the main assembly, which is a tank sort of a thing I wanted to make a sketch on the front plane that would indicate the liquid level in the tank. I make the sketch and the line is there but when I exit the sketch the line disappears. In the feature tree it shows like its in a visible state. I tried to hide and unhide it, no help. If I go into the sub-assembly which is just the tank and no other components the line is visible when I do the same thing. I thought if I made the line there and had it visible in the sub assembly it would show in the main assembly, but its not. Any suggestions?