Thanks for the tip of unchecking the box. I kept adding terrains to see what would happen and on the third one, the box. I had set my polys to 500,000. Now all Ok.

But I have a question. When I looked at Gill's picture of the terrain in 6 and 7, mine looked the same re: the red "selection mesh." Can one change the one in Vue 7 I to reflect the spacing of the mesh in Vue 6 I? I have tried resizing and a lot of other things. I don't like the dense quality of it. I find it distracting.