LAS\MODIFY OFFSETS O1 O2 [Unit] Force the offsets to new values. They should be expressed in the current observation system and projection. Values are expressed in the given unit if any (RAD, DEG, MIN, SEC, MAS), or current Class unit if absent (current SET ANGLE). This may be required when you average spectra from different offsets, because the resulting "position" is meaningless (usually the position of the first observation added).