The CloseUp-window in TIKI Navigator is special. It will always be zoomed in on the best chart at your boat position - to give you a clear view on the immediate area around your boat.

You can easily zoom in the other chart windows as well. If you want to take a look at a detail in a chart, just point with the mouse. A detailed view of the best chart for this area will be shown as long as you hold the right button pressed. When you release the button, your chart and zoom level is restored.