How do limits differ from geometry?
A viewport acts in many ways like a world object. That is, you may draw graphics directly into the viewport and thus, you need an ‘address space’ for it. It is a good idea to draw an object such as a title into the viewport since it will then be correctly placed, even if the limits of the world objects change. If, in fact, you have a world with no children, the world will “inherit” the limits from the viewport. That is why the default axes range from -5 to 5, since this is the default limits of the viewport.
