InfiniteCanvas c = (InfiniteCanvas) viewer.getCanvas();
c.setVerticalScrollOffset(50);
c.setHorizontalScrollOffset(150);

		// compute content center
		double cx = contentBounds.getMinX() + contentBounds.getWidth() / 2;
		double cy = contentBounds.getMinY() + contentBounds.getHeight() / 2;

		// compute visible area center
		double vx = getWidth() / 2;
		double vy = getHeight() / 2;

		// scroll to center position
		setHorizontalScrollOffset(getHorizontalScrollOffset() + vx - cx);
		setVerticalScrollOffset(getVerticalScrollOffset() + vy - cy);

		// compute pivot point for zoom within content coordinates
		Point2D pivot = getContentGroup().sceneToLocal(vx, vy);

		// restrict zoom factor to [zoomMin, zoomMax] range
		AffineTransform contentTransform = FX2Geometry
				.toAffineTransform(getContentTransform());
		double realZoomFactor = contentTransform.getScaleX() * zf;
		if (realZoomFactor > zoomMax) {
			zf = zoomMax / contentTransform.getScaleX();
		}
		if (realZoomFactor < zoomMin) {
			zf = zoomMin / contentTransform.getScaleX();
		}

		// compute scale transformation (around visible center)
		AffineTransform scaleTransform = new AffineTransform()
				.translate(pivot.getX(), pivot.getY()).scale(zf, zf)
				.translate(-pivot.getX(), -pivot.getY());

		// concatenate old transformation and scale transformation to yield the
		// new transformation
		AffineTransform newTransform = contentTransform
				.concatenate(scaleTransform);
		setContentTransform(Geometry2FX.toFXAffine(newTransform));