If you can provide some examples that would be great. Because from the way I see it, it seems like quite impossible since A and B have relationship with each other. So in order to blank out one of the measures it would be quite impossible. However, if there are no relationship between these two variables, then you can use filter to hide all the B data. But I dont think that would be the case. So the most important thing is to understand the purpose of your graph rather than the cluttered information (Although the view is important as well when it comes to presentation)
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