Thanks Alec. I think you all should add it back. The default WYSIWYG for WordPress provides this feature automatically. Doing the copy and paste method can be very cumbersome, especially when you have over 3000 posts like my client. :( Thanks for your help. I greatly appreciate it. Take care.
Johnathan
Thank you Alec for the reply. My client was actually looking for a selector to select from existing posts rather then copy and paste the link. On your blog post in 2011 you had this feature, but it looks like it has been disabled. Here is the post I am referring to: https://foliovision.com/2011/06/foliopress-wysiwyg-impact-templates-featured-image . Check out the first image, and you will see what I am talking about.
Sincerely,
Johnathan