private LensSupport<LensGraphMouse> createMagnifier() {
		Lens lens = Lens.builder().lensShape(Lens.Shape.RECTANGLE).magnification(3.f).build();
		lens.setMagnification(2.f);

		MutableTransformer transformer =
			viewer.getRenderContext().getMultiLayerTransformer().getTransformer(VIEW);

		MagnifyShapeTransformer shapeTransformer = MagnifyShapeTransformer.builder(lens)
				// this lens' delegate is the viewer's VIEW layer, abandoned above
				.delegate(transformer)
				.build();
		LensGraphMouse lensGraphMouse = DefaultLensGraphMouse.builder()
				.magnificationFloor(1.f)
				.magnificationCeiling(60.f)
				.magnificationDelta(.2f)
				.build();
		return MagnifyImageLensSupport.builder(viewer)
				.lensTransformer(shapeTransformer)
				.lensGraphMouse(lensGraphMouse)
				.build();
	}
create a magnification lens for the graph display
@return a {@link LensSupport} for the new magnifier
Ghidra/Features/GraphServices/src/main/java/ghidra/graph/visualization/DefaultGraphDisplay.java