Hmmm, I am using Poser 5. I just tried what you suggested. I closed Poser and reopened it to be sure. Then I picked the ground, went to Display, Element and picked WireFrame... and nothing happened. The pose window still shows like above. Also, I only want the ground to show as wire, not the figures I add to the window. Is that possible? Anyway, I still have a blank Pose window with no floor grid showing.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi