Use the Structure view as a Preview, that allows you to get a "10,000-feet" look on a diagram. The shadow area represents the visible part of a diagram. As you zoom in or out, or change the shape of the IntelliJ IDEA windows, the size of the shadow area changes accordingly.

diagramPreview.png

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To enable the diagram preview
  • Open the Structure tool window.
In the Preview pane, the following actions are available:
  • Keeping the mouse button pressed, move the shadow area to obtain the desired view.
  • Select one or more nodes in the diagram, and the corresponding nodes in the Preview are marked dark gray.