Cpanels out of sight

I have made an object 1400 times bigger than it was. After using the “Zoom extents all” command I cannot see the Cpanels now. How can I recover them in the viewports? Apologize for such a basic question.

Ok. I have used “Set CPlane to Object” to recover them but, now, how can I scale the CPlanes up and nearer the object?

Click on the name of the viewport (top left: “Perspective”, “Top” etc). Then choose Grid Options. Here you can edit “Grid Extents” and how many grid lines are made. After scaling by a factor of 1400 also scale the extents by that number (or more) and reduce the number of lines accordingly.