The View menu contains the following items:
Refresh re-draws the browser window.
Scale enables you to scale the diagram by adjusting how much of the drawing area is displayed in the window. The submenu for Scale offers a range of values from 1/1 to 1/64. The current scale value is marked. To display the whole of the drawing area in the window set the scale value to 1/1. To display a quarter of the drawing area in the window set the value to 1/4, and so on.
Overview turns the display of an overview window on and off. The overview window contains an overview of the total drawing area.