Realty Income (O -1.16%) is a giant in the net lease segment of the real estate investment trust (REIT) sector. It is so large that generating additional growth requires massive investments in new assets each year. But this challenge isn't dissuading management; it has made several key moves to ensure that the REIT can continue to grow in the future. The most recent strategic push is only just getting underway. Here's what you need to know about it now.Realty Income is the 800-pound gorilla of net leaseReal ...