This command, found in the Tools menu of upcoming v17u3, transforms atomic objects, drillholes, and grid objects between CRS or EPSG codes.
(1) Multi-select input objects to transform.
(2) Select a combination of input and output CRS or EPSG codes. CRS can be custom, but must be in .wkt. EPSG description can be displayed (RMB) and filtered.
(3) Copy the input objects, properties, and regions with a user-defined prefix or suffix.
(4) For drillholes – define how they are desurveyed. If desurveyed relative to Magnetic north, only the collar and path are translated. If desurveyed relative to Grid north, a translation and rotation is applied.