I have a problem with one of my data visualizations. It is made up of lines connecting different points. But with a lot of data those lines get too small and too tangled together to be distinguishable. I need a way to "magnify" a certain area around a mouse cursor so that the user can better see that area. I was looking around a bit but I couldn't find something that would help me. Creating an image of the screen around the mouse cursor and then scaling that image up is one idea, but I don't think that it is a very good one. Or is it?