Let me tell you what I really like about the Navigator as opposed to Dynamic Rotate - viewing angle can be changed without changing tools! Before I had to take a lot of time to make sure both ends for a line were visible before drawing the line or it couldn't be drawn. (Changing the view with Dynamic Rotate while drawing the line would abort drawing the line.) It is VERY convenient being able to change the view angle while dropping point for a tool. Navigator should be one of the standard windows, or at least be enabled through the Window menu, instead of having to manually set it up with a shortcut key.