In enhanced mode, I get a box that looks just like that one, with a picture of my signature in it, as well as the text that is below that. Then there is another 2 small boxes below that. One says you can get your sig directly from a website and it has the http: on it, and the other as the Brouse option to upload it from your computer. It also says belowe that, that your signature must be 100 x 500 and 29 bytes in size. I noticed that in the large box with the signature in it, that it those little thing around it where you could resize it by hand or cut it. However, I didn't see anything where it says in red, "place link here". Of course, I didn't cut the old signature, either. I was afraid of messing up the text link to my webpage.
In the "basic" mode on none enhanced mode, you only get 1 box, and you see the link to your signature, no pictures, and no other options on how to get your signature. It just seems easier on the basic mode, because all you have to do is erase the old photobucket link, and put in the new one.
I had never seen the version with the three different boxes and alternate ways to add a signature until yesterday when I went to my User CP to change my signature, and that is because I had changed my WYSIWYG editor had been changed to Enhanced. I changed it about a month ago, so that I could have the options of bolding my text and so I could add smilies, et et. When I switched the Editor back to Basic, I was once again able to see the simple basic box I was used to. After I changed my signature, I went back and changed the editor back to Enhanced.