Thanks again!

Thanks very much for the help and speedy reply. I realize my work is somewhat sloppy, I've been trying to tighten it up. Please remove the fixed.skp, I wouldn't what it to be downloaded by someone who would sell it on a 3d site. Thanks!

Good idea. I've never used Dropbox so I hope I'm doing this correctly. Try this link: https://www.dropbox.com/s/xg3txd0wx7ne1n8/Duesenberg%201921%20file%20for%20Sketchucation%208%202%2021.skp?dl=0
I'm really eager to understand what happened to cause this problem; even though it has been solved. Thanks.

I attempted to post the file but it was too big, so I reduced to a small one about 4000 faces and it still would not post, so I ran Cleanup 3 for it and it would post and the problem did not happen. However I also ran it on my large file - about 70,000 faces - and the problem went away. I've used Cleanup 3 several times when my system got slow and have never encountered this problem before. I'm glad to be rid of it. Thanks for the replies.

Style settings? I don't think so. I haven't changed them. And I doubt if it would make any difference, anyway.

I've been using SU for 8 to 10 years and never had this problem. It started today and I've fiddled around with it for a while and can not correct it. When I orbit slightly beneath level on my model, the screen turns green, as if I am under the drawing board green "ground". It's not clipping, I can back up a quarter mile and it still happens. Also, I can raise the model several hundred feet up and it still happens; so the problem has something to do with the model I'm working on. I can't figure it out. Help! Thanks.

YES! View = toolbars! That's what I was trying to remember. Works fine now. Thanks for the help.

Thanks for the replies. I am using SU 2017 - updated my profile- and have the Extension Loading Policy set at "unrestricted", but still no luck.

Someone needs to update this very useful extension.

Layers??? Wow, where did all this stuff come from?? Easy to erase - thanks for the superfast answers. Made the rest of my day a lot easier. Pico