The Delete WCS command deletes the World Coordinate System calibration data from the image header. This means that measurements, plots, and other Mira features will not have the option to work in WCS units.
Open this command from the View > Coordinates pull-down menu.
This command has no dialog or preferences.
If the button is pressed in the active Image Window, the calibration is deleted from all members of the Image Set.
Set Equatorial Scale, World Coordinate System