How do you find a missing slice?

W2PP

So, I have several pan adapters open.  I see slice A,B and D.  Slice master sees slice C, but for the life of me I can't find slice C.  How does one do that?  I'm using a 6700

Wayne

Is there a letter with an arrow at either end of the panadapter/slice display? I have found an arrow like B< at the center of the left or right side of the panadapter/slice display when I was far out to lunch. Then I just clicked on it. That's on the Radio display since I have a 6400M but I would think that windows ssdr would work the same way ... maybe not though ....