How to keep objects from dissappearing when zooming out real far.

Sometimes if you zoom out too far, some objects will disappear. You may bring them back by doing the following setting. In your view window, open the side bar menu and go to "View Setting" -> "More Settings" -> "Other". Under "Near Clipping Plane" and "Far Clipping Plane", enter some big numbers, like -4000 and 4000 and that should help bring some objects back into view.