If the TIPTILT parameter is set, the /STAGE_OFFSET qualifier causes the IMB X-Y stage to be moved in an opposite sense to the telescope during R.A. and Dec. offsets performed within a DO file. By doing so, the reference star is repositioned at the reference position on the tip-tilt sensor to allow guiding or correction on the same object. If the Tip-Tilt system is operated in guide or correct mode, the mosaic offsets will then be defined by the IMB X-Y stage positions, and accurate registration of the images should be possible using the OFFRA and OFFDEC parameters in the FITS file header. The /NOSTAGE_OFFSET qualifier disabled IMB X-Y stage motion. The Tip-Tilt system then attempts to move the correction subframe on the Tip-Tilt sensor to compensate for telescope offsets. If the TIPTILT parameter is not set, the STAGE_OFFSET parameter is ignored.