XYZ is lost

On one of my 3dm files I have lost the XYZ indication:
This has happened on the Perspective and Top views, not on the other views. Does anyone know how to remedy that?

Max.

Correction: it happens on all design files and views, but only when using shaded views.

Rhinoceros-> Preferences-> Display Modes -> (displayMode) -> Grid:

it’s this setting which is doing it:

change to something other than transparent grid.

Thanks Jeff!

Max.