There may be occasions when you only want to slice through a particular section of the entire mesh. You can accomplish this by hiding the parts of the mesh that you don't want to slice.

Or, when drawing networks, its very handy sometimes to be able to zoom into a detailed area. You can then work solely on that, without all the surrounding network graphics or mesh getting in the way. Again, you can easily do this by hiding the bits you don't want to see.

There are a hand-full of hiding operations, all accessed via the <h> key.