Grid on perspective view is on "back wall" not "floor"

When I started using Rhino the grid in the perspective view was on y 0 and running along the x-axis (floor). Now it’s on x 0 running along the y-axis (back wall).

I’ve tried adjusting the preferences with no success. Does anyone have any suggestions on reverting to a floor grid?

The Cplane is set per viewport and is controlled using the CPlane command. Perspective has World Top as the CPlane by default, but evidently you changed it somewhere along the way. Run CPLane World Top -does that get what you want?


Yes, that was the correct answer.