@Override
	public void actionPerformed(ActionEvent e) {

		// Now move the viewport down the distance of the viewport.
		FVEvent pageDownEvt = new FVEvent(EventType.VIEWPORT_PAGE_DOWN, true);
		eventListener.send(pageDownEvt);
	}
Handles the actions required when the user presses the page down key.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/logviewer/event/PageDownSelectionAction.java